Your FREE EKG Technician Certification (CET) Practice Test 2026 – 230+ Q&A

EKG Technician Practice Questions

1. An EKG technician transfers a patient's saved tracing onto a personal USB drive to review at home. Under HIPAA, this practice is best described as:
   • Encouraged as long as the drive is kept in a pocket
   • An impermissible removal of protected health information from secured systems
   • Required for continuing education credit
   • An acceptable way to study interesting cases

   Correct answer: An impermissible removal of protected health information from secured systems

   Copying a patient's tracing onto a personal USB drive is an impermissible removal of protected health information from secured systems, because it takes identifiable data outside controlled, encrypted environments and creates breach risk. It is not an acceptable study method, is not required for continuing education, and remains a violation regardless of where the drive is stored.

2. The HIPAA Security Rule specifically governs which form of protected health information?
   • Information written only on paper charts
   • Information communicated only by spoken word
   • Information that exists in electronic form
   • Information shared only with family members

   Correct answer: Information that exists in electronic form

   The Security Rule governs protected health information that exists in electronic form, setting standards for safeguarding electronic records, transmissions, and storage. Spoken and paper-based information fall primarily under the Privacy Rule, and family disclosures are a privacy matter rather than the focus of the Security Rule.

3. An EKG technician is approached by a hospital administrator who is not involved in a patient's care and asks to see that patient's tracing 'just to look.' The technician should:
   • Decline, since there is no treatment, payment, or operations need for access
   • Share only if the administrator promises confidentiality
   • Share it because an administrator outranks the technician
   • Print a copy for the administrator to keep

   Correct answer: Decline, since there is no treatment, payment, or operations need for access

   The technician should decline because there is no treatment, payment, or health care operations need for that administrator to access the tracing, and HIPAA limits access to a legitimate work purpose. Rank, verbal promises, or printing a copy do not create authorization to view a patient's record.

4. Which scenario is the clearest example of an incidental disclosure that HIPAA generally permits when reasonable safeguards are in place?
   • A visitor overhears a quiet, necessary clinical exchange despite reasonable precautions
   • A technician emails records to a friend for a second opinion
   • A technician posts a tracing online with the patient's initials
   • A technician discusses a named patient loudly in a public lobby

   Correct answer: A visitor overhears a quiet, necessary clinical exchange despite reasonable precautions

   A visitor overhearing a quiet, necessary clinical exchange despite reasonable precautions is a permitted incidental disclosure, because HIPAA tolerates limited, unavoidable exposures when safeguards are applied. Posting a tracing online, emailing records to a friend, and loudly discussing a named patient are deliberate impermissible disclosures, not incidental ones.

5. An EKG technician's facility offers patients a Notice of Privacy Practices. The primary purpose of this document is to:
   • Authorize the technician to diagnose conditions
   • Transfer ownership of the record to the patient
   • Bill the patient for privacy protections
   • Inform patients how their health information may be used and disclosed and their rights

   Correct answer: Inform patients how their health information may be used and disclosed and their rights

   The Notice of Privacy Practices informs patients how their health information may be used and disclosed and explains their rights regarding that information. It is not a billing tool, it does not transfer record ownership, and it has nothing to do with authorizing a technician to diagnose.

6. A reporter calls the unit and asks an EKG technician to confirm whether a public figure was treated for a cardiac event. The technician should:
   • Confirm the treatment since the person is well known
   • Describe the tracing without using the patient's name
   • Refuse to confirm or disclose any patient information and refer the call appropriately
   • Provide only the date of the visit

   Correct answer: Refuse to confirm or disclose any patient information and refer the call appropriately

   The technician should refuse to confirm or disclose any patient information and refer the call appropriately, because public figures retain full privacy rights and even confirming treatment is a disclosure. Confirming treatment, giving a visit date, or describing the tracing would each breach the patient's protected information.

7. An EKG technician notices that the unit's shared printer frequently leaves patient tracings sitting in the output tray. The best privacy-protecting fix is to:
   • Ask patients to collect their own tracings from the tray
   • Stop printing tracings entirely
   • Promptly retrieve printed tracings and route them to secure handling
   • Leave them in the tray but face down

   Correct answer: Promptly retrieve printed tracings and route them to secure handling

   Promptly retrieving printed tracings and routing them to secure handling protects privacy by limiting how long identifiable documents are exposed. Stopping printing entirely is impractical, having patients collect tracings exposes others' documents, and turning them face down still leaves protected information unattended.

8. Under the HIPAA minimum necessary principle, when an EKG technician schedules a follow-up test, the technician should access:
   • The patient's entire lifetime medical record
   • The records of the patient's family members
   • Any record that seems clinically interesting
   • Only the information needed to schedule and perform the test

   Correct answer: Only the information needed to schedule and perform the test

   The minimum necessary principle means the technician should access only the information needed to schedule and perform the test, limiting exposure of protected information. Pulling the entire record, viewing family members' records, or browsing interesting charts all exceed what the task requires.

9. OSHA requires that workers who may be exposed to bloodborne pathogens receive training:
   • Only after an exposure incident occurs
   • Only if the worker requests it in writing
   • Only once during their entire career
   • At the time of initial assignment and at least annually thereafter

   Correct answer: At the time of initial assignment and at least annually thereafter

   OSHA requires bloodborne pathogen training at the time of initial assignment and at least annually thereafter, keeping workers current on hazards and protections. Training is not a one-time event, is not triggered only by an exposure, and is not contingent on a written request from the worker.

10. Under OSHA's Bloodborne Pathogens Standard, recapping a used needle by hand is:
    • Acceptable if done quickly
    • Required before disposal in every case
    • Encouraged to keep the sharp covered
    • Generally prohibited because it increases needlestick risk

    Correct answer: Generally prohibited because it increases needlestick risk

    Recapping a used needle by hand is generally prohibited because it increases needlestick risk, and OSHA promotes safer alternatives such as one-handed techniques or safety devices. It is not encouraged, not required before disposal, and not made acceptable by doing it quickly.

11. An EKG technician must select a container for discarding a used, contaminated lancet. Which feature defines an OSHA-compliant sharps container?
    • Soft and flexible so it folds for storage
    • Open-topped for easy disposal
    • Clear glass so contents are visible
    • Puncture-resistant, leak-proof, and clearly labeled

    Correct answer: Puncture-resistant, leak-proof, and clearly labeled

    An OSHA-compliant sharps container is puncture-resistant, leak-proof, and clearly labeled to safely contain contaminated sharps. A soft folding container, breakable glass, or an open top would each fail to safely contain sharps and prevent injury or spillage.

12. Under OSHA's hierarchy of controls, the most preferred way to reduce bloodborne pathogen exposure is to:
    • Use engineering controls that eliminate or isolate the hazard
    • Depend solely on worker training
    • Post warning signs near the hazard
    • Rely on personal protective equipment as the first line of defense

    Correct answer: Use engineering controls that eliminate or isolate the hazard

    OSHA's hierarchy of controls favors engineering controls that eliminate or isolate the hazard, such as sharps containers and self-sheathing needles, as the most preferred measure. Personal protective equipment, training, and warning signs are lower-tier controls that supplement rather than replace engineering solutions.

13. An EKG technician sees a Safety Data Sheet listed for a surface disinfectant but cannot find the actual sheet. Under OSHA, the technician should:
    • Ensure the SDS is readily accessible before using the product
    • Use the disinfectant without further concern
    • Discard the disinfectant immediately
    • Dilute the disinfectant to make it safer

    Correct answer: Ensure the SDS is readily accessible before using the product

    The technician should ensure the SDS is readily accessible before using the product, because OSHA requires that hazard information be available to workers who use chemicals. Using it without the sheet, discarding the product, or arbitrarily diluting it do not satisfy the requirement that hazard information be on hand.

14. Which item is required to be labeled with a biohazard symbol under OSHA standards?
    • An unopened package of alcohol prep pads
    • A roll of fresh EKG paper
    • A container holding regulated medical waste contaminated with blood
    • A box of clean disposable electrodes

    Correct answer: A container holding regulated medical waste contaminated with blood

    A container holding regulated medical waste contaminated with blood must be labeled with a biohazard symbol so workers can identify and handle it safely. Clean electrodes, fresh EKG paper, and unopened alcohol pads are not contaminated and do not require biohazard labeling.

15. An EKG technician identifies the steps to break the chain of infection. Disinfecting a shared blood pressure cuff between patients primarily interrupts which link?
    • The mode of transmission
    • The susceptible host
    • The portal of entry into the technician
    • The infectious agent's ability to reproduce

    Correct answer: The mode of transmission

    Disinfecting a shared blood pressure cuff between patients primarily interrupts the mode of transmission, removing organisms from a vehicle that would otherwise carry them between patients. It does not change host susceptibility, halt the agent's reproduction inside a host, or specifically block the technician's portal of entry.

16. A patient in a private room has a sign indicating droplet precautions. Before performing an EKG, the technician should primarily add which item to standard precautions?
    • Sterile surgical attire
    • A surgical mask
    • A lead apron
    • A fit-tested N95 respirator

    Correct answer: A surgical mask

    For droplet precautions, the technician should primarily add a surgical mask to standard precautions, since droplet-spread organisms travel short distances and a surgical mask provides appropriate protection. An N95 is reserved for airborne precautions, a lead apron is for radiation, and sterile surgical attire is unnecessary for an EKG.

17. Which practice best reflects the difference between cleaning and disinfecting shared EKG equipment?
    • Cleaning removes visible soil while disinfecting reduces microorganisms
    • Disinfecting must always come before cleaning
    • Cleaning sterilizes equipment completely
    • Cleaning and disinfecting mean exactly the same thing

    Correct answer: Cleaning removes visible soil while disinfecting reduces microorganisms

    Cleaning removes visible soil while disinfecting reduces microorganisms, and effective infection control usually requires cleaning before disinfecting. The two are not identical, disinfection follows rather than precedes cleaning, and ordinary cleaning does not achieve complete sterilization.

18. An EKG technician should perform hand hygiene before putting on gloves primarily because:
    • Gloves alone prevent all contamination
    • Hand hygiene is only needed after glove removal
    • Gloves make hand hygiene unnecessary
    • Hands can transfer organisms to the gloves' outer surface during donning and the gloves may have unseen defects

    Correct answer: Hands can transfer organisms to the gloves' outer surface during donning and the gloves may have unseen defects

    Hand hygiene before gloving matters because hands can transfer organisms to the gloves during donning and gloves may have unseen defects, so clean hands add a layer of protection. Gloves are not infallible, hand hygiene is needed both before and after, and gloves never eliminate the need for hand hygiene.

19. An EKG technician is asked to clean an obviously soiled cot mattress contaminated with body fluids. The infection-control-appropriate first action is to:
    • Apply fresh linens directly over the soil
    • Spray air freshener and continue
    • Don gloves and remove visible soil before disinfecting the surface
    • Use the cot as is for the next patient

    Correct answer: Don gloves and remove visible soil before disinfecting the surface

    The technician should don gloves and remove visible soil before disinfecting the surface, because disinfectants work poorly over organic material. Covering soil with linens, masking odor with air freshener, or reusing the soiled cot all leave contamination in place.

20. Cohorting and proper room placement of patients with the same infection are infection-control strategies aimed at:
    • Reducing the facility's laundry costs
    • Speeding up EKG acquisition
    • Improving the appearance of the unit
    • Limiting the spread of organisms to uninfected patients

    Correct answer: Limiting the spread of organisms to uninfected patients

    Cohorting and proper room placement aim to limit the spread of organisms to uninfected patients by grouping or isolating those with the same infection. These strategies are not designed to cut laundry costs, speed testing, or improve appearance.

21. Standard precautions include respiratory hygiene and cough etiquette, which direct patients and staff to:
    • Cover coughs, use tissues, and perform hand hygiene afterward
    • Hold in coughs until leaving the building
    • Cough freely into open air to clear the airway
    • Avoid wearing masks under any circumstance

    Correct answer: Cover coughs, use tissues, and perform hand hygiene afterward

    Respiratory hygiene and cough etiquette direct people to cover coughs, use tissues, and perform hand hygiene afterward to limit droplet spread. Coughing into open air, refusing masks, or suppressing coughs do not control the spread of respiratory secretions.

22. Under standard precautions, the safe sequence for removing contaminated personal protective equipment generally ends with:
    • Performing hand hygiene after all equipment is removed
    • Reusing the gown on the next patient
    • Touching the face before removing the mask
    • Removing the gown first and gloves last

    Correct answer: Performing hand hygiene after all equipment is removed

    The safe sequence ends with performing hand hygiene after all equipment is removed, because hands may be contaminated during the doffing process. Removing the gown before gloves out of order, touching the face before the mask is off, or reusing a gown each risk self-contamination or transmission.

23. An EKG technician with a small open cut on the hand is preparing to test a patient. Under standard precautions, the technician should:
    • Ask the patient to avoid the affected hand
    • Apply the cut directly against the electrode for stability
    • Cover the cut with a clean dressing and wear gloves
    • Proceed bare-handed since the cut is minor

    Correct answer: Cover the cut with a clean dressing and wear gloves

    The technician should cover the cut with a clean dressing and wear gloves, since non-intact skin is a portal of entry for pathogens. Proceeding bare-handed, relying on the patient to avoid the hand, or pressing the wound against equipment all leave the technician and patient exposed.

24. Treating all patients' blood and body fluids as potentially infectious, regardless of diagnosis, is the foundational concept behind which approach?
    • Selective screening of risky patients
    • Precautions based on the patient's appearance
    • Standard (universal) precautions
    • Targeted precautions for known infections only

    Correct answer: Standard (universal) precautions

    Treating all patients' blood and body fluids as potentially infectious is the foundation of standard, or universal, precautions, which apply consistently to every patient. Targeting only known infections, selectively screening, or judging by appearance would all leave gaps because infection status is often unknown.

25. When applying standard precautions during an EKG that involves no anticipated contact with blood or body fluids, gloves are:
    • Required only for the chest leads
    • Always required regardless of the situation
    • Forbidden during any EKG
    • Not strictly required for routine electrode placement on intact skin

    Correct answer: Not strictly required for routine electrode placement on intact skin

    Gloves are not strictly required for routine electrode placement on intact skin when no contact with blood or body fluids is anticipated, though hand hygiene is still essential. Gloves are not mandatory in every situation, are not selectively required for only the chest leads, and are certainly not forbidden during an EKG.

26. A nurse hands an EKG technician a vacutainer and asks the technician to draw the patient's blood sample. The scope-appropriate response is to:
    • Draw the blood to be efficient
    • Draw the blood only from the arm without electrodes
    • Ask the patient to draw their own blood
    • Decline if phlebotomy is outside the technician's training and authorization

    Correct answer: Decline if phlebotomy is outside the technician's training and authorization

    The technician should decline if phlebotomy is outside the technician's training and authorization, since performing an unauthorized invasive task exceeds scope. Drawing blood to be efficient, choosing a particular arm, or having the patient self-draw all overstep the technician's defined role.

27. An EKG technician is most appropriately authorized to perform which of the following?
    • Adjusting a patient's antiarrhythmic medication dose
    • Connecting a patient to a Holter monitor and providing wear instructions
    • Interpreting and reporting a final diagnosis from the tracing
    • Removing a patient's central venous catheter

    Correct answer: Connecting a patient to a Holter monitor and providing wear instructions

    Connecting a patient to a Holter monitor and providing wear instructions is within the EKG technician's scope. Interpreting a final diagnosis, adjusting medication doses, and removing a central line are clinical responsibilities reserved for physicians, nurses, or other licensed providers.

28. A patient on a telemetry unit asks the EKG technician to disconnect them from monitoring so they can shower. The scope-appropriate action is to:
    • Disconnect the patient and reconnect later
    • Check with the patient's nurse before any change in monitoring
    • Refuse and ignore the request entirely
    • Tell the patient to disconnect themselves

    Correct answer: Check with the patient's nurse before any change in monitoring

    The technician should check with the patient's nurse before any change in monitoring, because deciding whether continuous telemetry can be interrupted is a clinical judgment beyond the technician's scope. Disconnecting independently, having the patient do it, or ignoring the request without escalation would each be inappropriate.

29. Which statement best describes the EKG technician's role when a tracing shows a potentially life-threatening rhythm?
    • Independently initiate treatment for the rhythm
    • Wait for the next scheduled rounds to mention it
    • Tell the patient which medication they will need
    • Recognize the urgency and immediately alert a qualified clinician

    Correct answer: Recognize the urgency and immediately alert a qualified clinician

    The technician should recognize the urgency and immediately alert a qualified clinician, ensuring rapid response while staying within scope. Initiating treatment, delaying until rounds, or advising the patient on medication would each exceed the role or dangerously delay care.

30. An EKG technician who is unsure whether a newly requested task is within their scope should first consult:
    • A coworker's personal opinion only
    • Facility policy, the job description, and the supervisor or certifying standards
    • The patient's preference
    • An unrelated department's practices

    Correct answer: Facility policy, the job description, and the supervisor or certifying standards

    The technician should first consult facility policy, the job description, and the supervisor or certifying standards, which together define authorized tasks. A coworker's opinion, the patient's preference, or another department's practices do not reliably establish the technician's scope.

31. An EKG technician notices that completing a particular advanced lead study requires skills they were never trained to perform. The professional response is to:
    • Perform a different study instead without authorization
    • Inform the supervisor and request training or referral to a qualified staff member
    • Attempt the study and improvise the technique
    • Document the study as done without performing it

    Correct answer: Inform the supervisor and request training or referral to a qualified staff member

    The professional response is to inform the supervisor and request training or referral to a qualified staff member, keeping practice within demonstrated competence. Improvising, substituting an unauthorized study, or falsely documenting completion would each compromise safety and integrity.

32. Maintaining current certification and required competencies relates to scope of practice because it:
    • Demonstrates the qualifications that support performing authorized tasks safely
    • Allows the technician to expand into diagnosis
    • Has no connection to what tasks a technician may perform
    • Replaces the need for physician orders

    Correct answer: Demonstrates the qualifications that support performing authorized tasks safely

    Maintaining current certification and competencies demonstrates the qualifications that support performing authorized tasks safely, reinforcing the technician's scope. It is directly connected to permitted tasks, does not extend the role into diagnosis, and does not eliminate the need for physician orders.

33. An EKG technician delegated a routine task by a supervisor remains responsible for:
    • Accepting any task regardless of preparation
    • Performing only tasks within their training and competence
    • Reassigning the task to an untrained aide
    • Diagnosing any abnormal findings discovered

    Correct answer: Performing only tasks within their training and competence

    Even when delegated a task, the technician remains responsible for performing only tasks within their training and competence. Accepting tasks beyond preparation, reassigning to an untrained aide, or diagnosing abnormal findings would each violate scope and accountability.

34. A physician asks an EKG technician for their opinion on whether a tracing shows ischemia. Within scope, the technician should:
    • State a definitive diagnostic conclusion
    • Refuse to discuss the tracing at all
    • Share factual observations about the tracing while leaving interpretation to the physician
    • Order additional cardiac enzymes to confirm

    Correct answer: Share factual observations about the tracing while leaving interpretation to the physician

    Within scope, the technician should share factual observations about the tracing while leaving interpretation to the physician, contributing useful information without diagnosing. Offering a definitive diagnosis or ordering tests exceeds scope, while refusing to discuss the tracing would withhold helpful observations.

35. A patient becomes hostile and verbally aggressive toward an EKG technician during setup. The most appropriate professional response is to:
    • Threaten to cancel the patient's care
    • Abandon the patient immediately without notifying anyone
    • Argue with the patient to assert authority
    • Remain calm, maintain professional boundaries, and seek assistance if safety is threatened

    Correct answer: Remain calm, maintain professional boundaries, and seek assistance if safety is threatened

    The technician should remain calm, maintain professional boundaries, and seek assistance if safety is threatened, protecting both the patient and themselves. Arguing escalates conflict, abandoning the patient without notice neglects care, and threatening to cancel care is unprofessional.

36. When an EKG technician hands off a patient to another department, the most useful information to communicate for coordinated care is:
    • The test performed, the patient's status, and any relevant concerns
    • The technician's personal opinion of the physician
    • The technician's lunch schedule
    • Unverified rumors about the patient

    Correct answer: The test performed, the patient's status, and any relevant concerns

    For coordinated care, the technician should communicate the test performed, the patient's status, and any relevant concerns, ensuring continuity. A lunch schedule, rumors, or personal opinions about colleagues are irrelevant or inappropriate for a clinical handoff.

37. An EKG technician documents in the EHR that a 12-lead was completed but later realizes only a single-lead rhythm strip was actually obtained. The correct response is to:
    • Ask the patient not to mention it
    • Leave the entry since something was recorded
    • Correct the documentation to accurately reflect what was performed, following facility procedure
    • Delete the patient's whole record

    Correct answer: Correct the documentation to accurately reflect what was performed, following facility procedure

    The technician should correct the documentation to accurately reflect what was performed, following facility procedure, preserving record integrity. Leaving an inaccurate entry, deleting the record, or asking the patient to stay silent would each compromise the accuracy and trustworthiness of the chart.

38. A coworker asks an EKG technician to clock them in early even though they have not arrived. The professionally and ethically correct response is to:
    • Clock the coworker in as a favor
    • Clock them in but only by a few minutes
    • Decline, because falsifying time records is dishonest
    • Ask a supervisor to do it instead

    Correct answer: Decline, because falsifying time records is dishonest

    The technician should decline because falsifying time records is dishonest and violates professional integrity. Clocking the coworker in, doing so by a few minutes, or pushing the falsification onto a supervisor would all participate in or enable a dishonest act.

39. An EKG technician realizes a patient was given the wrong appointment instructions, leading to confusion about fasting. The technician's best action is to:
    • Tell the patient the instructions never mattered
    • Ignore it because the test can proceed anyway
    • Inform the supervising clinician so the discrepancy can be resolved
    • Quietly reschedule without telling anyone

    Correct answer: Inform the supervising clinician so the discrepancy can be resolved

    The technician should inform the supervising clinician so the discrepancy can be resolved and the correct preparation confirmed. Ignoring the issue, dismissing the instructions, or rescheduling silently could compromise the validity or safety of the test.

40. A patient who speaks limited English nods politely but appears not to understand the EKG instructions. The technician should:
    • Proceed faster to finish before confusion grows
    • Obtain a qualified interpreter to confirm understanding before proceeding
    • Assume the nodding means full understanding
    • Have the patient sign without explanation

    Correct answer: Obtain a qualified interpreter to confirm understanding before proceeding

    The technician should obtain a qualified interpreter to confirm understanding before proceeding, ensuring genuine comprehension and cooperation. Assuming nodding equals understanding, rushing, or obtaining a signature without explanation would each risk a misunderstanding and invalid consent.

41. Which behavior best supports a culture of patient safety on a cardiac care team?
    • Hiding minor errors to keep statistics clean
    • Reporting near-misses and errors so processes can be improved
    • Blaming individuals harshly for any mistake
    • Discouraging questions to maintain efficiency

    Correct answer: Reporting near-misses and errors so processes can be improved

    Reporting near-misses and errors so processes can be improved best supports a culture of patient safety, allowing systems to be corrected. Hiding errors, harsh individual blame, and discouraging questions all suppress the information needed to prevent future harm.

42. An EKG technician notices that a patient's wristband identifiers do not match the EHR record open on the screen. The technician should:
    • Choose whichever name seems more likely correct
    • Proceed and reconcile the records later
    • Stop and resolve the identity discrepancy before testing
    • Ask the patient to pick which record to use

    Correct answer: Stop and resolve the identity discrepancy before testing

    The technician should stop and resolve the identity discrepancy before testing, because mismatched identifiers indicate a possible wrong-patient error. Proceeding to reconcile later, guessing the correct name, or letting the patient choose a record could result in misidentified care.

43. A patient on a stretcher about to be transported for an EKG has both side rails down and is unattended. The safety-conscious technician should:
    • Ask the patient to hold the rails up
    • Raise the side rails and ensure the patient is safely secured before moving
    • Leave the rails down for easier access
    • Begin transport quickly before anyone notices

    Correct answer: Raise the side rails and ensure the patient is safely secured before moving

    The technician should raise the side rails and ensure the patient is safely secured before moving, preventing a fall during transport. Transporting hastily, leaving rails down, or relying on the patient to hold the rails would each create an unnecessary fall risk.

44. An EKG technician spills a small amount of a chemical disinfectant on the floor near the workstation. The first appropriate action is to:
    • Cover the spill with paper and continue testing
    • Mix it with another cleaner to neutralize it
    • Walk away and let it evaporate
    • Follow the spill procedure and consult the Safety Data Sheet for proper cleanup

    Correct answer: Follow the spill procedure and consult the Safety Data Sheet for proper cleanup

    The technician should follow the spill procedure and consult the Safety Data Sheet for proper cleanup, ensuring the chemical is handled safely. Ignoring the spill, merely covering it, or mixing chemicals together could create slip, exposure, or reaction hazards.

45. Personal protective equipment provided to EKG technicians under OSHA must be:
    • Purchased by the employee out of pocket
    • Reused indefinitely to reduce waste
    • Provided by the employer at no cost to the worker
    • Optional in all patient-care situations

    Correct answer: Provided by the employer at no cost to the worker

    Under OSHA, personal protective equipment must be provided by the employer at no cost to the worker when needed for protection. Employees are not required to buy their own, single-use equipment is not reused indefinitely, and protective equipment is mandatory when exposure is anticipated.

46. An EKG technician finds a sharps container that is filled to its marked capacity line. The correct action is to:
    • Close, seal, and replace the container rather than overfilling it
    • Empty it into the regular trash to reuse it
    • Press the contents down to make room
    • Add a few more sharps carefully

    Correct answer: Close, seal, and replace the container rather than overfilling it

    The technician should close, seal, and replace the container rather than overfilling it, because overfilling causes needlestick injuries during disposal. Pressing contents down, adding more sharps, or emptying it into regular trash would each create serious exposure hazards.

47. Which action best demonstrates infection control when an EKG technician moves between patients in adjacent beds?
    • Performing hand hygiene and changing gloves between patients
    • Skipping hand hygiene because the beds are close together
    • Touching the second patient before removing the first patient's gloves
    • Wearing the same gloves for both patients to save time

    Correct answer: Performing hand hygiene and changing gloves between patients

    Performing hand hygiene and changing gloves between patients best demonstrates infection control, preventing cross-contamination. Reusing gloves, touching the next patient before removing soiled gloves, or skipping hand hygiene all allow organisms to spread between patients.

48. A patient scheduled for an EKG is known to be immunocompromised. To protect this patient, the technician should be especially diligent about:
    • Allowing more visitors into the room
    • Strict hand hygiene and using clean or disinfected equipment
    • Working faster to reduce contact time
    • Skipping the gown to avoid fuss

    Correct answer: Strict hand hygiene and using clean or disinfected equipment

    For an immunocompromised patient, the technician should be especially diligent about strict hand hygiene and using clean or disinfected equipment, since the patient is more vulnerable to infection. Rushing, skipping protective measures, or increasing visitors would each raise the patient's infection risk.

49. An EKG technician should don personal protective equipment in which general order before patient contact?
    • Mask only after touching the patient
    • Gown, then mask or respirator, then eye protection, then gloves
    • Eye protection last, after gloves and contact
    • Gloves, then gown, then mask

    Correct answer: Gown, then mask or respirator, then eye protection, then gloves

    The general donning order is gown, then mask or respirator, then eye protection, then gloves, with gloves applied last so they remain clean. Putting gloves on first, applying a mask after patient contact, or saving eye protection until after contact would each undermine the protective barrier.

50. Under standard precautions, an alcohol-based hand rub is an acceptable hand hygiene method when:
    • Hands are not visibly soiled and no contraindication exists
    • The patient has a spore-forming infection requiring soap and water
    • Hands are visibly soiled with blood
    • After using the restroom in all cases

    Correct answer: Hands are not visibly soiled and no contraindication exists

    An alcohol-based hand rub is acceptable when hands are not visibly soiled and no contraindication exists, offering convenient, effective decontamination. Visibly soiled hands, certain spore-forming organisms, and restroom use generally call for soap and water instead.

51. An EKG technician preparing to perform a 12-lead notices the patient is coughing frequently and has a suspected respiratory infection. Applying standard precautions plus appropriate transmission-based precautions means the technician should:
    • Rely on the patient to cover their own mouth only
    • Wait until the infection is confirmed before taking any precautions
    • Apply the precautions indicated for the suspected respiratory infection
    • Skip any added precautions since an EKG is brief

    Correct answer: Apply the precautions indicated for the suspected respiratory infection

    The technician should apply the precautions indicated for the suspected respiratory infection, layering transmission-based precautions onto standard precautions. The brevity of the test, awaiting confirmation, or relying solely on the patient does not provide adequate protection against a suspected transmissible infection.

52. An EKG technician is asked to obtain a patient's signature on an informed consent form for a cardiac procedure the physician will perform. Within scope, the technician should:
    • Sign the form on the patient's behalf
    • Tell the patient the procedure is completely risk-free
    • Defer the consent discussion to the provider performing the procedure
    • Explain the risks and benefits of the procedure themselves

    Correct answer: Defer the consent discussion to the provider performing the procedure

    The technician should defer the consent discussion to the provider performing the procedure, because explaining risks and benefits for informed consent is the provider's responsibility. Explaining the procedure's risks, signing for the patient, or minimizing risks would each exceed the technician's scope.

53. An EKG technician feels pressured by a busy schedule to skip verifying patient identity. The correct prioritization is to:
    • Always verify identity regardless of time pressure
    • Let the receptionist verify identity instead
    • Verify identity only for first-time patients
    • Skip verification when the unit is busy

    Correct answer: Always verify identity regardless of time pressure

    The technician should always verify identity regardless of time pressure, because wrong-patient errors are serious and preventable. Skipping verification when busy, limiting it to new patients, or assuming the receptionist handled it all increase the risk of testing the wrong person.

54. When the care team conducts a time-out before a cardiac procedure, the EKG technician's appropriate contribution is to:
    • Take over leading the procedure
    • Confirm relevant information such as correct patient and test as their role allows
    • Remain silent to avoid slowing the team
    • Skip the time-out if they are confident

    Correct answer: Confirm relevant information such as correct patient and test as their role allows

    During a time-out, the technician should confirm relevant information such as correct patient and test as their role allows, supporting the safety check. Staying silent, taking over the procedure, or skipping the time-out would each weaken this important verification step.

55. A patient confides personal, non-clinical information to an EKG technician during a test. The professional, privacy-conscious response is to:
    • Share the story with coworkers as an interesting anecdote
    • Keep the information confidential and focus on the patient's care
    • Record the personal details in the medical chart
    • Post about it anonymously online

    Correct answer: Keep the information confidential and focus on the patient's care

    The technician should keep the information confidential and focus on the patient's care, respecting the patient's trust and privacy. Sharing the story, posting it online, or recording irrelevant personal details in the chart would each breach confidentiality or clutter the record inappropriately.

56. An EKG technician overhears that a coworker has been browsing patient records of people they personally know. The appropriate action is to:
    • Report the suspected privacy violation through proper channels
    • Warn the coworker only and take no further step
    • Access the same records to verify the claim
    • Join in since the records are accessible

    Correct answer: Report the suspected privacy violation through proper channels

    The technician should report the suspected privacy violation through proper channels, because unauthorized record access is a HIPAA breach. Joining in, merely warning the coworker, or accessing records to verify the claim would each compound the violation rather than address it.

57. An EKG technician must dispose of a printed tracing that is no longer needed but contains the patient's name. The privacy-compliant method is to:
    • Place it in the recycling bin
    • Crumple it and discard it in regular trash
    • Take it home for personal record-keeping
    • Shred it or use a designated secure-disposal bin

    Correct answer: Shred it or use a designated secure-disposal bin

    The technician should shred it or use a designated secure-disposal bin, ensuring identifiable information cannot be retrieved. Recycling, tossing it in regular trash, or taking it home would each leave protected health information exposed to unauthorized access.

58. Which is the strongest example of protecting electronic protected health information at an EKG workstation?
    • Sharing one login among all technicians for convenience
    • Using a unique login and locking the screen when stepping away
    • Leaving the record open for the next user to find
    • Writing the password on a sticky note on the monitor

    Correct answer: Using a unique login and locking the screen when stepping away

    Using a unique login and locking the screen when stepping away most strongly protects electronic protected health information by ensuring accountability and preventing unauthorized viewing. Shared logins, posted passwords, and open unattended records all undermine security and traceability.

59. An EKG technician notices a patient appears anxious and is breathing rapidly but has stable vital signs and no chest pain. The coordinated-care appropriate action is to:
    • Diagnose the patient with a panic disorder
    • End the test and send the patient away
    • Offer calm reassurance, monitor the patient, and notify clinical staff if status changes
    • Administer an anti-anxiety medication

    Correct answer: Offer calm reassurance, monitor the patient, and notify clinical staff if status changes

    The technician should offer calm reassurance, monitor the patient, and notify clinical staff if status changes, supporting the patient within scope. Diagnosing a disorder, administering medication, or abruptly ending and dismissing the patient would each exceed scope or neglect appropriate care.

60. An EKG technician is asked by a family member to slip a get-well card and the patient's tracing under the patient's pillow as a surprise. The technician should:
    • Decline to share the tracing, since releasing records must follow proper procedures
    • Hand the tracing directly to the family member
    • Read the tracing results aloud to the family
    • Comply with the family's friendly request

    Correct answer: Decline to share the tracing, since releasing records must follow proper procedures

    The technician should decline to share the tracing, since releasing records must follow proper procedures and the family is not automatically authorized. Complying, handing over the tracing, or reading results aloud would each improperly disclose protected health information.

61. During a code response, the EKG technician's role within the team is best described as:
    • Prescribing emergency medications
    • Assisting within their training, such as helping with monitoring or compressions as directed
    • Deciding when to stop resuscitation
    • Directing the resuscitation efforts

    Correct answer: Assisting within their training, such as helping with monitoring or compressions as directed

    During a code, the technician assists within their training, such as helping with monitoring or compressions as directed, supporting the team. Directing the resuscitation, prescribing medications, and deciding when to stop are responsibilities of physicians and other licensed leaders of the code.

62. An EKG technician realizes mid-procedure that the EKG machine has not been cleaned since the previous infectious patient. The technician should:
    • Ask the patient whether cleaning is necessary
    • Finish the current test and clean later
    • Continue because cleaning is the next shift's job
    • Pause, properly disinfect the equipment, and then proceed safely

    Correct answer: Pause, properly disinfect the equipment, and then proceed safely

    The technician should pause, properly disinfect the equipment, and then proceed safely, preventing transmission from the prior patient. Finishing first and cleaning later, deferring to the next shift, or asking the patient to decide would each expose the current patient to contamination.

63. Which action by an EKG technician best supports continuity of care when a patient is being admitted from the emergency department to a cardiac unit?
    • Discarding the emergency department tracing as outdated
    • Ensuring the completed tracing and relevant findings are available to the receiving team
    • Withholding the tracing until the unit asks for it
    • Telling the patient not to mention prior symptoms

    Correct answer: Ensuring the completed tracing and relevant findings are available to the receiving team

    The technician best supports continuity of care by ensuring the completed tracing and relevant findings are available to the receiving team. Withholding the tracing, discarding it, or telling the patient to omit prior symptoms would each disrupt the information the cardiac unit needs.

64. An EKG technician notices wet floor signs were never placed after the unit floor was mopped. The safety-conscious action is to:
    • Alert the appropriate staff so warning signs are placed to prevent falls
    • Place a patient chair over the wet area
    • Walk carefully and say nothing
    • Assume everyone will notice the wet floor

    Correct answer: Alert the appropriate staff so warning signs are placed to prevent falls

    The technician should alert the appropriate staff so warning signs are placed to prevent falls, addressing an environmental hazard. Walking carefully in silence, improvising a chair barrier, or assuming others will notice would each leave patients and staff at risk of slipping.

65. A patient with a documented adhesive allergy is scheduled for an EKG. To keep the patient safe, the technician should:
    • Select appropriate hypoallergenic electrodes and document the allergy
    • Apply electrodes for less time to reduce the reaction
    • Skip the leads over sensitive skin areas
    • Use standard adhesive electrodes and watch for irritation

    Correct answer: Select appropriate hypoallergenic electrodes and document the allergy

    The technician should select appropriate hypoallergenic electrodes and document the allergy, preventing a skin reaction while obtaining the tracing. Using standard adhesives and watching for irritation, shortening contact time, or skipping leads would each risk a reaction or compromise the study.

66. When an EKG technician completes mandatory annual competency and safety training, this most directly supports:
    • Eliminating the need for personal protective equipment
    • Reducing the patient's wait time
    • Maintaining safe, current practice and meeting regulatory requirements
    • Allowing the technician to interpret EKGs

    Correct answer: Maintaining safe, current practice and meeting regulatory requirements

    Completing mandatory annual competency and safety training most directly supports maintaining safe, current practice and meeting regulatory requirements. It does not primarily shorten wait times, remove the need for protective equipment, or authorize the technician to interpret tracings.

67. An EKG technician is unsure whether a patient understood that they should report any chest pain during testing. The best coordinated-care action is to:
    • Skip the instruction to avoid alarming the patient
    • Tell the patient to ignore minor symptoms
    • Assume the patient will speak up if needed
    • Re-explain clearly and confirm the patient knows to report symptoms immediately

    Correct answer: Re-explain clearly and confirm the patient knows to report symptoms immediately

    The technician should re-explain clearly and confirm the patient knows to report symptoms immediately, ensuring safety during testing. Assuming the patient will speak up, omitting the instruction, or telling the patient to ignore symptoms could delay recognition of a developing emergency.

68. An EKG technician encounters a combative patient and a coworker suggests photographing the patient's behavior on a personal phone 'for proof.' The technician should:
    • Post the photo only in a private staff chat
    • Refuse, because photographing the patient violates privacy and policy, and report through proper channels
    • Take the photo but blur the patient's face
    • Take the photo to protect themselves

    Correct answer: Refuse, because photographing the patient violates privacy and policy, and report through proper channels

    The technician should refuse, because photographing the patient violates privacy and policy, and instead report the incident through proper channels. Taking the photo, blurring the face, or posting it in a staff chat would each improperly capture and share protected information.

69. An EKG technician notices the unit is using an expired bottle of skin-prep solution. The appropriate action is to:
    • Dilute it to extend its life
    • Remove the expired product from use and obtain an in-date supply
    • Use it only on non-allergic patients
    • Use it since it probably still works

    Correct answer: Remove the expired product from use and obtain an in-date supply

    The technician should remove the expired product from use and obtain an in-date supply, since expired solutions may be ineffective or unsafe. Using it anyway, diluting it, or restricting it to certain patients would each rely on a product that no longer meets safety or efficacy standards.

70. A patient asks the EKG technician whether their results were shared with their employer. The technician should:
    • Explain that disclosing results to an employer requires the patient's authorization and refer privacy questions appropriately
    • Confirm that the employer received the results
    • Promise that no one will ever see the results
    • Tell the patient that employers always receive results

    Correct answer: Explain that disclosing results to an employer requires the patient's authorization and refer privacy questions appropriately

    The technician should explain that disclosing results to an employer requires the patient's authorization and refer privacy questions appropriately, reflecting HIPAA limits on disclosures. Confirming an employer received results, claiming employers always do, or promising absolute secrecy would each misstate the patient's privacy protections.

71. An EKG technician is documenting an incident in which a patient nearly fell during transport but was caught in time. The appropriate documentation reflects:
    • An assignment of blame to the patient
    • Nothing, since no injury occurred
    • Only the parts that make the technician look good
    • An accurate, objective account of what occurred per facility policy

    Correct answer: An accurate, objective account of what occurred per facility policy

    Appropriate documentation reflects an accurate, objective account of what occurred per facility policy, supporting safety review even when no injury results. Selectively recording flattering details, assigning blame, or omitting the event entirely would each undermine an honest, useful safety record.

72. An EKG technician is told the facility was cited after an inspection of its bloodborne pathogen practices. The agency that conducts such workplace inspections and issues citations is the:
    • Centers for Medicare and Medicaid Services
    • The Joint Commission on Privacy
    • State Board of Cardiology
    • Occupational Safety and Health Administration

    Correct answer: Occupational Safety and Health Administration

    The Occupational Safety and Health Administration conducts workplace safety inspections and issues citations, including for bloodborne pathogen violations. The Centers for Medicare and Medicaid Services handles reimbursement standards, there is no 'Joint Commission on Privacy,' and a state board of cardiology does not inspect workplace safety practices.

73. A patient asks the EKG technician to access and tell them the results of a different test ordered by another department. Within scope and privacy rules, the technician should:
    • Refuse to acknowledge the other test exists
    • Summarize the other results from memory
    • Look up and read the other results aloud
    • Direct the patient to the ordering provider or proper records channel for those results

    Correct answer: Direct the patient to the ordering provider or proper records channel for those results

    The technician should direct the patient to the ordering provider or proper records channel for those results, since releasing and interpreting other tests is outside the technician's role and must follow proper procedures. Reading them aloud, summarizing from memory, or flatly denying the test exists would each be inappropriate.

74. To reduce the risk of healthcare-associated infection, an EKG technician should perform hand hygiene at which key moment in addition to before and after patient contact?
    • Only if a supervisor is observing
    • Only when leaving the building for the day
    • After contact with the patient's surroundings or contaminated surfaces
    • Only once per group of patients in a shared room

    Correct answer: After contact with the patient's surroundings or contaminated surfaces

    Hand hygiene should also be performed after contact with the patient's surroundings or contaminated surfaces, because these can harbor organisms even without direct patient contact. Cleaning only at day's end, once per group, or only when observed would each leave significant gaps in protection.

75. A standard 12-lead EKG records six chest leads and how many limb-derived leads?
    • Twelve
    • Six
    • Nine
    • Three

    Correct answer: Six

    The standard 12-lead EKG includes six limb-derived leads: the three bipolar leads I, II, and III plus the three augmented leads aVR, aVL, and aVF. Three counts only the bipolar leads, nine and twelve overstate the limb total by mixing in chest leads or the full set, so six is the correct number of limb-derived views.

76. During preparation for a 12-lead EKG, the technician should remove the patient's metal jewelry near electrode sites mainly to:
    • Lower the gain setting
    • Increase the patient's heart rate
    • Reduce the chance of artifact and interference in the tracing
    • Speed up the recording

    Correct answer: Reduce the chance of artifact and interference in the tracing

    Removing metal jewelry near electrode sites reduces the chance of artifact and interference, helping produce a clean tracing. It does not meaningfully speed recording, does not affect the patient's heart rate, and is unrelated to the gain setting, so cleaner signal quality is the purpose.

77. A technician must record a 12-lead EKG on a patient with a bandaged left chest wound covering the usual V3 site. The best action is to:
    • Skip V3 and record only the other leads
    • Move all chest leads to the right side
    • Place V3 as close as safely possible to the correct site and document the deviation
    • Place V3 directly on top of the bandage

    Correct answer: Place V3 as close as safely possible to the correct site and document the deviation

    The technician should place V3 as close as safely possible to its correct site and document the deviation so the interpreter knows. Skipping the lead loses data, placing it on the bandage gives no skin contact, and shifting all chest leads to the right would produce an unintended right-sided study.

78. Which sequence correctly describes how a technician should perform a routine 12-lead EKG?
    • Place chest leads only, then record, then add limb leads
    • Identify patient, prep skin, place electrodes, then record
    • Record, then prep skin, then identify the patient
    • Print first, then place electrodes, then identify the patient

    Correct answer: Identify patient, prep skin, place electrodes, then record

    The correct sequence is to identify the patient, prep the skin, place the electrodes, and then record. Printing or recording before placing electrodes is impossible, identifying the patient last risks a wrong-patient test, and recording with only chest leads omits the limb leads.

79. The total of ten electrodes used for a 12-lead EKG is divided into how many limb electrodes and how many chest electrodes?
    • Five limb and five chest
    • Two limb and eight chest
    • Six limb and four chest
    • Four limb and six chest

    Correct answer: Four limb and six chest

    The ten electrodes are divided into four limb electrodes, one on each extremity, and six chest electrodes for V1 through V6. Six-and-four reverses the split, five-and-five and two-and-eight do not match the standard arrangement, so four limb and six chest is correct.

80. The left-arm limb electrode in a standard color-coded set is conventionally:
    • Green
    • Red
    • White
    • Black

    Correct answer: Black

    In the AHA color convention used in the United States, the left-arm electrode is black. White marks the right arm, green marks the right leg as ground, and red marks the left leg, so black corresponds to the left arm in standard limb-lead color coding.

81. The left-leg limb electrode in the standard color code is conventionally:
    • White
    • Red
    • Black
    • Green

    Correct answer: Red

    The left-leg electrode is conventionally red in the AHA standard color scheme used in the United States. White is the right arm, black is the left arm, and green is the right-leg ground, so red identifies the left leg.

82. A technician places the right-leg electrode on the lower right leg. The primary function this electrode serves is to:
    • Act as the ground that reduces electrical noise
    • Record lead III directly
    • Generate the precordial leads
    • Set the paper speed

    Correct answer: Act as the ground that reduces electrical noise

    The right-leg electrode acts as the ground that reduces electrical noise on the tracing. It does not directly record lead III, does not generate the chest leads, and has nothing to do with paper speed, so its role is grounding the recording.

83. When the limb electrodes must be moved more proximally on the arms for a restless patient, the technician should:
    • Use the legs for both arm leads
    • Move only one arm electrode and leave the other distal
    • Place them on the chest instead
    • Place them on matching positions on both arms to keep symmetry

    Correct answer: Place them on matching positions on both arms to keep symmetry

    If proximal placement is needed, the technician should move both arm electrodes to matching positions to preserve the symmetry of the limb leads. Moving only one creates asymmetry, placing them on the chest or both on the legs changes the lead identities entirely.

84. Einthoven's law states that the sum of the voltages in leads I and III equals the voltage in:
    • Lead V1
    • Lead aVF
    • Lead II
    • Lead aVR

    Correct answer: Lead II

    Einthoven's law states that lead I plus lead III equals lead II, reflecting the geometry of the limb leads. The augmented leads aVR and aVF and the chest lead V1 are not the sum defined by this relationship, so lead II is the correct answer.

85. If a technician knows the deflections in leads I and II, Einthoven's law allows lead III to be found by:
    • Multiplying lead I by lead II
    • Ignoring both leads
    • Subtracting lead I from lead II
    • Adding lead I to lead II

    Correct answer: Subtracting lead I from lead II

    Because lead II equals lead I plus lead III, lead III can be found by subtracting lead I from lead II. Adding the two leads or multiplying them does not follow from the relationship, and ignoring the leads provides no value, so subtraction is correct.

86. Einthoven's law is mathematically possible because the three standard limb leads:
    • Are all chest leads
    • Form a closed triangle around the heart
    • Use the same single electrode
    • Record at different paper speeds

    Correct answer: Form a closed triangle around the heart

    Einthoven's law holds because the three standard limb leads form a closed triangle around the heart, making their voltages mathematically related. They do not share a single electrode, are not chest leads, and are recorded at the same paper speed, so the triangular geometry is the basis.

87. A technician reviewing a tracing notices the limb-lead voltages do not satisfy the relationship lead I plus lead III equals lead II. This may indicate:
    • A normal, expected result
    • A limb-lead misplacement or recording error worth checking
    • A correctly calibrated machine
    • A standard chest-lead pattern

    Correct answer: A limb-lead misplacement or recording error worth checking

    When the limb leads fail Einthoven's relationship, it may indicate a limb-lead misplacement or recording error worth checking before interpretation. A violation is not the normal expectation, does not confirm correct calibration, and is unrelated to chest-lead patterns.

88. Einthoven's triangle assigns a positive pole and a negative pole to each limb lead. In lead I, the positive pole is at the:
    • Left arm
    • Left leg
    • Right arm
    • Right leg

    Correct answer: Left arm

    In lead I, the positive pole is at the left arm and the negative pole is at the right arm. The left leg is the positive pole for leads II and III, and the right leg is the ground, so the left arm is correct for lead I.

89. Within Einthoven's triangle, lead III is recorded between the:
    • Right arm and left arm
    • Left arm and left leg
    • Two chest electrodes
    • Right arm and right leg

    Correct answer: Left arm and left leg

    Lead III is recorded between the left arm and the left leg, forming the lower-left side of Einthoven's triangle. The right-arm-to-left-arm pairing is lead I, a right-arm-to-right-leg pairing is not a standard bipolar lead, and chest electrodes form the precordial leads.

90. A teaching diagram labels each corner of Einthoven's triangle. The corner NOT part of the triangle is the:
    • Right arm
    • Left arm
    • Right leg
    • Left leg

    Correct answer: Right leg

    The right leg, which serves as the ground, is not one of the three corners of Einthoven's triangle. The right arm, left arm, and left leg form the three corners that create leads I, II, and III, so the right leg is the corner that does not belong.

91. Because Einthoven's triangle treats the heart as electrically central, swapping two limb electrodes mainly changes the:
    • Apparent direction and shape of the limb-lead complexes
    • Paper speed of the machine
    • Number of chest leads recorded
    • Thermal paper color

    Correct answer: Apparent direction and shape of the limb-lead complexes

    Swapping two limb electrodes changes the apparent direction and shape of the limb-lead complexes because it alters the triangle's axes. It does not change paper speed, the number of chest leads, or the color of thermal paper, so the distortion of limb-lead vectors is the key effect.

92. The augmented lead aVL primarily provides a view of the heart from the perspective of the:
    • Left leg
    • Right arm
    • Left arm
    • Chest wall

    Correct answer: Left arm

    The augmented lead aVL provides a view from the perspective of the left arm. aVR reflects the right arm, aVF reflects the left leg (inferior view), and the chest wall is viewed by the precordial leads, so the left arm corresponds to aVL.

93. The augmented lead aVF views the heart from the perspective of the:
    • Left leg (foot)
    • Left arm
    • Right arm
    • Right leg

    Correct answer: Left leg (foot)

    The augmented lead aVF views the heart from the perspective of the left leg, giving an inferior view. aVR reflects the right arm and aVL the left arm, while the right leg is the ground rather than a recording position, so the left leg corresponds to aVF.

94. The augmented limb leads are called augmented because the EKG machine:
    • Doubles the paper speed for them
    • Records them with extra electrodes
    • Increases their amplitude to make small unipolar signals readable
    • Prints them in a separate color

    Correct answer: Increases their amplitude to make small unipolar signals readable

    The augmented limb leads are named because the machine increases their amplitude so the small unipolar signals are readable. The machine does not change paper speed for them, does not require extra electrodes beyond the limb set, and does not print them in a separate color.

95. A technician sees that aVR, aVL, and aVF are all distorted, but the chest leads look normal. This pattern suggests a problem with the:
    • Chest electrodes
    • Limb electrodes
    • Paper feed
    • Thermal printhead

    Correct answer: Limb electrodes

    Because the augmented leads are derived from the limb electrodes, distortion limited to aVR, aVL, and aVF with normal chest leads suggests a limb-electrode problem. A chest-electrode issue would affect the V leads, and paper or printhead faults would distort all leads, so the limb electrodes are the likely source.

96. Of the augmented leads, the one that normally shows complexes pointing mostly downward in a healthy heart is:
    • aVR
    • Lead I
    • aVF
    • aVL

    Correct answer: aVR

    In a healthy heart, aVR normally shows complexes pointing mostly downward because it views the heart from the right shoulder, opposite the main direction of depolarization. aVL and aVF typically show upright or mixed complexes, and lead I is a bipolar limb lead rather than an augmented lead.

97. After placing all electrodes, the technician should connect the lead wires by:
    • Leaving the limb wires off to save time
    • Matching each labeled wire to its correct electrode
    • Attaching them in any order since the machine sorts them
    • Connecting only the chest wires

    Correct answer: Matching each labeled wire to its correct electrode

    The technician should connect each labeled lead wire to its correct electrode so every lead records accurately. The machine does not re-sort misconnected wires, connecting only chest wires omits the limb leads, and leaving limb wires off produces an incomplete tracing.

98. Disposable adhesive EKG electrodes contain a conductive gel that functions to:
    • Speed up the paper feed
    • Hold the electrode color in place
    • Set the machine's gain
    • Improve electrical conduction between skin and electrode

    Correct answer: Improve electrical conduction between skin and electrode

    The conductive gel improves electrical conduction between the skin and the electrode, producing a stronger, cleaner signal. It does not maintain color coding, set the gain, or affect the paper feed, so its role is electrical conduction.

99. A technician finds the disposable electrodes have dried out and feel hard. The technician should:
    • Discard them and use fresh, moist electrodes
    • Use them anyway since they were the right type
    • Add tap water to rehydrate them
    • Heat them to soften the gel

    Correct answer: Discard them and use fresh, moist electrodes

    Dried-out electrodes should be discarded and replaced with fresh, moist ones, because dry gel gives poor conduction and artifact. Using them as is degrades the signal, adding tap water does not restore proper conductive gel, and heating them can damage the electrode without fixing conduction.

100. To ensure firm electrode adhesion, the technician should apply each electrode to skin that is:
     • Covered with powder
     • Clean and dry after prep
     • Freshly moistened with lotion
     • Still wet with alcohol

     Correct answer: Clean and dry after prep

     Electrodes adhere best to skin that is clean and dry after prep. Lotion and powder both interfere with adhesion, and applying over alcohol that has not yet dried can loosen the electrode and irritate the skin, so clean dry skin is correct.

101. When peeling and applying adhesive electrodes, the technician should press around the edges to:
     • Change the lead's polarity
     • Increase the gain
     • Ensure full contact and prevent the electrode from lifting
     • Speed the recording

     Correct answer: Ensure full contact and prevent the electrode from lifting

     Pressing around the edges ensures full contact and prevents the electrode from lifting, reducing artifact. It does not change the gain, alter the lead's polarity, or speed the recording, so secure adhesion is the goal.

102. V1 and V2 are placed on opposite sides of the sternum at the same level. That level is the:
     • Second intercostal space
     • Fifth intercostal space
     • Sixth intercostal space
     • Fourth intercostal space

     Correct answer: Fourth intercostal space

     V1 and V2 are placed at the fourth intercostal space on the right and left sides of the sternum respectively. The second intercostal space is too high, while the fifth and sixth spaces correspond to the level of V4 through V6, so the fourth intercostal space is correct.

103. After placing V4 at the midclavicular line, the technician keeps V5 and V6 on the same horizontal level as V4 to:
     • Match the limb-lead colors
     • Save time
     • Maintain the proper horizontal plane across the lateral chest
     • Reduce the paper speed

     Correct answer: Maintain the proper horizontal plane across the lateral chest

     Keeping V5 and V6 on the same horizontal level as V4 maintains the proper horizontal plane across the lateral chest, ensuring accurate lateral views. It is not about saving time, limb-lead colors, or paper speed, so preserving the horizontal plane is the reason.

104. A technician cannot clearly count intercostal spaces because of body habitus. The best approach is to:
     • Use only V1 and V6
     • Place all chest leads over the sternum
     • Estimate by placing electrodes evenly spaced down the chest
     • Carefully palpate landmarks such as the sternal angle and ribs

     Correct answer: Carefully palpate landmarks such as the sternal angle and ribs

     The technician should carefully palpate landmarks such as the sternal angle and ribs to locate the correct intercostal spaces. Evenly spacing by guess, clustering leads over the sternum, or using only two chest leads would each misplace electrodes and produce an inaccurate or incomplete recording.

105. Placing the precordial electrodes too far laterally on the chest can cause:
     • Altered chest-lead amplitudes and a misleading tracing
     • Loss of the limb leads
     • A doubled paper speed
     • Faster heart rate

     Correct answer: Altered chest-lead amplitudes and a misleading tracing

     Placing the precordial electrodes too far laterally alters the chest-lead amplitudes and can produce a misleading tracing. It does not change the heart rate, does not affect the limb leads, and has no effect on paper speed, so the consequence is distorted chest-lead morphology.

106. The correct horizontal order of the six precordial electrodes across the chest is:
     • V6, V5, V4, V3, V2, V1 from right to left
     • All six clustered over the apex
     • V1 at the right sternal border progressing leftward to V6 at the midaxillary line
     • V1 through V6 stacked vertically over the sternum

     Correct answer: V1 at the right sternal border progressing leftward to V6 at the midaxillary line

     The precordial electrodes progress from V1 at the right sternal border leftward to V6 at the left midaxillary line. They are not clustered over the apex or stacked vertically over the sternum, and describing them right to left as V6 through V1 reverses the standard labeling.

107. A patient with a left-arm amputation needs a 12-lead EKG. The left-arm electrode is best placed on the:
     • Chest at V1
     • Left shoulder or remaining left-arm stump near the trunk
     • Right arm instead
     • Left leg

     Correct answer: Left shoulder or remaining left-arm stump near the trunk

     For a left-arm amputation, the left-arm electrode is best placed on the left shoulder or the remaining stump near the trunk to approximate the limb position. Using the right arm or left leg changes lead identities, and the V1 chest site is a precordial position, not a limb-lead substitute.

108. When recording an EKG on a very young, frightened pediatric patient, the technician should:
     • Use adult-sized electrodes for stronger signal
     • Allow a caregiver to help comfort the child and explain the painless nature of the test
     • Skip the explanation since the child cannot understand
     • Restrain the child tightly and record quickly

     Correct answer: Allow a caregiver to help comfort the child and explain the painless nature of the test

     The technician should allow a caregiver to help comfort the child and explain that the test is painless, which reduces movement and artifact. Tight restraint increases distress and artifact, skipping reassurance is unkind and unhelpful, and adult electrodes are too large for accurate pediatric placement.

109. For an EKG on a patient who is obese, obtaining accurate chest-lead contact is best achieved by:
     • Recording only the limb leads
     • Pressing electrodes through clothing
     • Carefully locating bony landmarks and ensuring firm skin contact at the correct spaces
     • Placing all chest leads on the upper abdomen

     Correct answer: Carefully locating bony landmarks and ensuring firm skin contact at the correct spaces

     For a patient who is obese, accuracy is best achieved by carefully locating bony landmarks and ensuring firm skin contact at the correct intercostal spaces. Recording through clothing prevents contact, moving leads to the abdomen misplaces them, and limb leads alone omit the chest views.

110. A bedridden patient cannot have the legs accessed for limb electrodes due to dressings. The technician should:
     • Place the leg electrodes on the lower abdomen or upper thigh region as an approximation and document it
     • Move the leg leads to the arms
     • Record without any leg electrodes
     • Cancel the EKG

     Correct answer: Place the leg electrodes on the lower abdomen or upper thigh region as an approximation and document it

     When the legs are inaccessible, the technician can place the leg electrodes on an approximating position such as the upper thigh or lower trunk and document the deviation. Canceling denies care, moving them to the arms changes lead identity, and omitting leg electrodes leaves the limb leads incomplete.

111. During an EKG on a pregnant patient near term, supine positioning may cause hypotension because the:
     • Enlarged uterus compresses major blood vessels
     • Machine drains the patient's blood pressure
     • Electrodes block circulation
     • Chest leads press on the lungs

     Correct answer: Enlarged uterus compresses major blood vessels

     Near term, lying supine can cause hypotension because the enlarged uterus compresses major blood vessels, reducing blood return. The electrodes and machine do not affect circulation, and chest-lead placement does not cause this effect, so vessel compression by the uterus is the cause.

112. A Holter monitor is best described as a device that:
     • Continuously records the heart's rhythm over an extended period such as 24 to 48 hours
     • Defibrillates the heart
     • Measures only blood pressure
     • Records a single resting 12-lead EKG

     Correct answer: Continuously records the heart's rhythm over an extended period such as 24 to 48 hours

     A Holter monitor continuously records the heart's rhythm over an extended period, typically 24 to 48 hours, while the patient goes about daily activities. It is not a single resting EKG, does not measure blood pressure, and does not defibrillate, so prolonged ambulatory recording defines it.

113. A common reason a physician orders a Holter monitor is to:
     • Measure cholesterol levels over time
     • Permanently treat an arrhythmia
     • Replace the need for any electrodes
     • Capture intermittent symptoms or arrhythmias that a brief EKG may miss

     Correct answer: Capture intermittent symptoms or arrhythmias that a brief EKG may miss

     A Holter monitor is commonly ordered to capture intermittent symptoms or arrhythmias that a brief resting EKG may miss. It still requires electrodes, does not measure cholesterol, and is a diagnostic recorder rather than a treatment device.

114. When educating a patient about wearing a Holter monitor, the technician should instruct the patient to:
     • Disconnect the leads at night
     • Get the recorder wet during showers
     • Remove the electrodes whenever active
     • Keep the device on and record symptoms and activities in a diary

     Correct answer: Keep the device on and record symptoms and activities in a diary

     The technician should instruct the patient to keep the device on and maintain a diary of symptoms and activities so events can be correlated with the recording. Removing electrodes during activity, wetting the recorder, or disconnecting leads at night would each create gaps in the continuous data.

115. A patient returns a Holter monitor and reports the diary shows palpitations at 3 p.m. The technician's role is to:
     • Ensure the recording and diary are properly downloaded and submitted for physician review
     • Erase the recording before review
     • Diagnose the arrhythmia and start treatment
     • Adjust the patient's medication

     Correct answer: Ensure the recording and diary are properly downloaded and submitted for physician review

     The technician's role is to ensure the recording and diary are properly downloaded and submitted for physician review. Diagnosing, prescribing treatment, and altering medication are outside the technician's scope, and erasing the recording would destroy the data needed for interpretation.

116. Compared with continuous in-hospital telemetry, a Holter monitor is distinctive because it:
     • Is portable and records the patient's rhythm during normal daily activity
     • Requires the patient to stay in bed
     • Transmits live to a central station in real time
     • Uses no electrodes

     Correct answer: Is portable and records the patient's rhythm during normal daily activity

     A Holter monitor is distinctive because it is portable and records the patient's rhythm during normal daily activity outside the hospital. It does not confine the patient to bed, does require electrodes, and typically stores data for later review rather than transmitting live like telemetry.

117. On telemetry, secure electrode adhesion is especially important because:
     • Movement increases the real heart rate
     • Loose electrodes change the paper speed
     • Telemetry does not use a monitor screen
     • The patient moves around, and loose electrodes cause false alarms and lost data

     Correct answer: The patient moves around, and loose electrodes cause false alarms and lost data

     On telemetry, secure adhesion matters because the patient moves around and loose electrodes cause false alarms and lost data. Telemetry does use monitoring displays, movement does not change the true heart rate, and electrode adhesion has no effect on paper speed.

118. A telemetry technician observing several monitors notices one shows a rhythm that suddenly becomes life-threatening. The technician should first:
     • Wait to see if it resolves
     • Adjust the gain and continue watching
     • Document it at the end of the shift
     • Immediately notify the appropriate clinical staff per protocol

     Correct answer: Immediately notify the appropriate clinical staff per protocol

     The technician should immediately notify the appropriate clinical staff per protocol so the patient can be assessed. Waiting, merely adjusting the gain, or delaying documentation could delay urgent care for a life-threatening rhythm.

119. To prepare a patient for telemetry, the technician applies the electrodes to:
     • Clean, dry, prepped skin in the appropriate positions
     • Areas still wet with lotion
     • Random spots to test the signal
     • The patient's clothing

     Correct answer: Clean, dry, prepped skin in the appropriate positions

     Telemetry electrodes should be applied to clean, dry, prepped skin in the appropriate positions for a reliable signal. Lotioned skin, clothing, and random placement would each cause poor contact, artifact, or an unusable rhythm.

120. A telemetry patient is going to physical therapy. The technician should ensure the:
     • Electrodes are removed for the session
     • Lead wires are wrapped tightly around the limbs
     • Transmitter is secured and the patient stays within monitoring range if required
     • Monitor alarms are turned off

     Correct answer: Transmitter is secured and the patient stays within monitoring range if required

     The technician should ensure the transmitter is secured and the patient remains within monitoring range if the protocol requires it, so monitoring continues. Removing electrodes or silencing alarms interrupts surveillance, and tightly wrapping lead wires around the limbs risks artifact and discomfort.

121. Frequent false telemetry alarms are best reduced by:
     • Using fresh electrodes with good skin prep and secure lead connections
     • Turning the volume down only
     • Increasing the gain
     • Lowering the bed

     Correct answer: Using fresh electrodes with good skin prep and secure lead connections

     Frequent false alarms are best reduced by using fresh electrodes with good skin prep and secure lead connections, which improve signal quality. Lowering the bed does nothing for the signal, simply muting the volume hides true alarms, and increasing the gain can amplify artifact.

122. The standard EKG calibration signal verifies that a 1-millivolt input produces a deflection of:
     • 20 millimeters
     • 10 millimeters
     • 25 millimeters
     • 5 millimeters

     Correct answer: 10 millimeters

     The standard calibration signal verifies that a 1-millivolt input produces a 10-millimeter deflection. A 5-millimeter deflection indicates half standardization, while 20 and 25 millimeters exceed standard gain, so the 10-millimeter calibration confirms correct sensitivity.

123. Why should the calibration mark be printed on every EKG tracing?
     • It cleans the printhead
     • It identifies the patient
     • It confirms the gain and lets the reader verify amplitude measurements
     • It increases the heart rate

     Correct answer: It confirms the gain and lets the reader verify amplitude measurements

     The calibration mark confirms the gain so the reader can verify that amplitude measurements are accurate. It does not identify the patient, affect heart rate, or clean the printhead, so its purpose is documenting the machine's sensitivity setting.

124. A technician sees a calibration box that is 20 millimeters tall. This indicates the machine is set to:
     • Standard gain
     • Half standardization
     • No calibration
     • Double standardization

     Correct answer: Double standardization

     A 20-millimeter calibration box indicates double standardization, where a 1-millivolt signal produces twice the normal deflection. A 5-millimeter box would mean half standardization, a 10-millimeter box is standard, and the presence of the box means calibration is set rather than absent.

125. Before submitting a tracing, the technician confirms the calibration box is the correct height to ensure that:
     • The room is properly grounded
     • The patient is correctly positioned
     • The waveform amplitudes can be measured reliably
     • The paper will not jam

     Correct answer: The waveform amplitudes can be measured reliably

     Confirming the calibration box height ensures the waveform amplitudes can be measured reliably during interpretation. It does not verify patient positioning, room grounding, or paper feed, which are separate checks, so calibration is specifically about amplitude accuracy.

126. If the gain is changed to half-standardization to fit very tall complexes on the paper, the technician must:
     • Increase the paper speed to compensate
     • Reverse the limb leads
     • Hide the change from the reader
     • Clearly mark the standardization change on the tracing

     Correct answer: Clearly mark the standardization change on the tracing

     When using half-standardization, the technician must clearly mark the change on the tracing so the reader correctly interprets the amplitudes. Hiding the change risks misreading, changing paper speed does not compensate for amplitude, and reversing leads creates an unrelated error.

127. At a paper speed of 25 mm/sec, one second of recording spans how many millimeters of paper?
     • 50 millimeters
     • 10 millimeters
     • 25 millimeters
     • 100 millimeters

     Correct answer: 25 millimeters

     At 25 mm/sec, one second of recording spans 25 millimeters of paper, since the paper advances 25 millimeters each second. Ten millimeters represents less than half a second, while 50 and 100 millimeters correspond to faster speeds or longer times, so 25 millimeters is correct.

128. On standard paper at 25 mm/sec, five large boxes represent how much time?
     • 0.50 second
     • 2.0 seconds
     • 1.0 second
     • 0.20 second

     Correct answer: 1.0 second

     Five large boxes represent 1.0 second, because each large box is 0.20 second and five of them total one second. One large box alone is 0.20 second, two and a half large boxes are 0.50 second, and ten large boxes are 2.0 seconds, so five large boxes equal one second.

129. A pediatric cardiologist requests a recording at 50 mm/sec for an infant. The technician should:
     • Set the gain to 50 mm/mV
     • Use 25 mm/sec instead without telling anyone
     • Refuse because only 25 mm/sec is allowed
     • Set the speed to 50 mm/sec and clearly note it on the tracing

     Correct answer: Set the speed to 50 mm/sec and clearly note it on the tracing

     The technician should set the speed to 50 mm/sec as requested and clearly note it on the tracing so the faster speed is accounted for during interpretation. Refusing an appropriate order, silently using a different speed, or changing the gain instead would not meet the request correctly.

130. If a tracing is recorded at 50 mm/sec but read as though it were 25 mm/sec, the measured intervals will appear:
     • Longer than they really are
     • Exactly correct
     • Negative
     • Shorter than they really are

     Correct answer: Longer than they really are

     Reading a 50 mm/sec tracing as if it were 25 mm/sec makes intervals appear longer than they really are, because the waveforms are spread out over more paper per unit time. They would not appear shorter, correct, or negative, so the error inflates the apparent intervals.

131. The technician marks the paper speed on the tracing primarily so that:
     • The paper feeds faster
     • The electrodes adhere better
     • The reader knows how to convert distance into time accurately
     • The patient stays still

     Correct answer: The reader knows how to convert distance into time accurately

     Marking the paper speed lets the reader accurately convert distance on the paper into time. It does not affect how fast the paper feeds, whether the patient stays still, or electrode adhesion, so accurate time interpretation is the purpose.

132. Loading EKG paper correctly with the grid facing the printhead is important because:
     • Otherwise the tracing prints blank or on the wrong side
     • It adjusts the gain
     • It removes artifact
     • It changes the heart rate

     Correct answer: Otherwise the tracing prints blank or on the wrong side

     If the paper is loaded incorrectly, the thermal tracing may print blank or on the wrong side, wasting paper and delaying the test. Paper loading does not change heart rate, adjust gain, or remove artifact, so correct orientation ensures the tracing prints.

133. When the EKG machine displays a low-paper warning before a study, the technician should:
     • Start the recording and hope it lasts
     • Reduce the paper speed to save paper
     • Reload a full roll of paper before recording
     • Skip printing and rely on the screen only

     Correct answer: Reload a full roll of paper before recording

     The technician should reload a full roll of paper before recording so the tracing is complete. Starting with low paper risks an incomplete record, reducing speed distorts measurements, and relying on the screen alone may leave no permanent tracing for the chart.

134. Inspecting lead wires before each use is part of maintenance because frayed or kinked wires can:
     • Increase calibration accuracy
     • Speed up recording
     • Introduce artifact and intermittent signal loss
     • Improve signal quality

     Correct answer: Introduce artifact and intermittent signal loss

     Frayed or kinked lead wires can introduce artifact and intermittent signal loss, degrading the tracing. They do not improve signal quality, speed recording, or increase calibration accuracy, so inspecting and replacing damaged wires protects recording integrity.

135. After a patient with a known contagious skin infection has an EKG, the technician should:
     • Only wipe the screen
     • Reuse the lead wires immediately on the next patient
     • Disinfect the equipment and surfaces per protocol before the next use
     • Discard the entire machine

     Correct answer: Disinfect the equipment and surfaces per protocol before the next use

     The technician should disinfect the equipment and surfaces per protocol before the next use to prevent cross-contamination. Reusing wires without cleaning risks transmission, discarding the machine is wasteful and unnecessary, and wiping only the screen leaves contaminated patient-contact parts.

136. Routine functional checks of the EKG machine, such as verifying it powers on and the printer works, should be performed:
     • Regularly as part of maintenance so the machine is ready when needed
     • Never, since the machine self-repairs
     • Only after a malfunction is reported
     • Only once a year

     Correct answer: Regularly as part of maintenance so the machine is ready when needed

     Routine functional checks should be performed regularly as part of maintenance so the machine is ready when needed. Annual-only checks are too infrequent, the machine does not self-repair, and waiting for a malfunction means problems are found at the worst time.

137. Muscle (somatic) tremor artifact is most likely in a patient who is:
     • Calm and warm
     • Tense, cold, or has a movement disorder
     • Holding perfectly still
     • Fully relaxed and supported

     Correct answer: Tense, cold, or has a movement disorder

     Muscle tremor artifact is most likely in a patient who is tense, cold, or has a movement disorder, because muscle activity contaminates the tracing. A calm, warm, still, or fully supported patient produces minimal muscle artifact, so the tense or shivering patient is at greatest risk.

138. A technician sees coarse, irregular fuzz over the complexes most prominent in the leads attached to a tremoring arm. The best interpretation is:
     • A pacemaker is firing
     • Somatic tremor artifact from that limb
     • A normal tracing
     • Sixty-cycle interference

     Correct answer: Somatic tremor artifact from that limb

     Coarse, irregular fuzz most prominent in leads from a tremoring limb indicates somatic tremor artifact from that limb. It is not a pacemaker firing, which produces sharp spikes, not regular AC interference, and not a normal tracing, so localized tremor is the cause.

139. To reduce somatic tremor in a patient who is anxious, the technician should first:
     • Increase the gain to overpower the artifact
     • Reassure the patient and help them relax before recording
     • Move the limb electrodes onto the joints
     • Record during deep coughing

     Correct answer: Reassure the patient and help them relax before recording

     For an anxious patient, the technician should first reassure them and help them relax, which reduces muscle activity and tremor. Increasing the gain magnifies artifact, recording during coughing adds movement, and placing electrodes on joints worsens motion artifact.

140. Somatic tremor differs from 60-cycle interference primarily in that somatic tremor is:
     • Coarse and irregular rather than uniform
     • Always a flat line
     • Perfectly regular at 60 cycles per second
     • A slow rolling drift

     Correct answer: Coarse and irregular rather than uniform

     Somatic tremor is coarse and irregular rather than the uniform, regular pattern of 60-cycle interference. It is not perfectly regular at 60 cycles, not a flat line (a disconnected lead), and not a slow rolling drift (a wandering baseline), so irregularity distinguishes it.

141. A wandering baseline is best described as the tracing's center line:
     • Filling with regular sharp spikes
     • Disappearing entirely
     • Splitting into two lines
     • Slowly drifting up and down across the strip

     Correct answer: Slowly drifting up and down across the strip

     A wandering baseline is the tracing's center line slowly drifting up and down across the strip. It is not the line disappearing (a disconnected lead), filling with regular spikes (AC interference), or splitting into two lines, so the slow vertical drift defines it.

142. A frequent cause of wandering baseline is:
     • Standard 10 mm/mV gain
     • Lotion or oils on the skin reducing electrode contact
     • A properly grounded outlet
     • Excellent skin preparation

     Correct answer: Lotion or oils on the skin reducing electrode contact

     Lotion or oils on the skin reduce electrode contact and frequently cause a wandering baseline. Excellent skin prep, a grounded outlet, and standard gain are all correct conditions that help prevent artifact rather than cause baseline drift.

143. To fix a wandering baseline before a repeat tracing, the technician should:
     • Increase the paper speed
     • Have the patient breathe deeply and rapidly
     • Lower the room temperature
     • Re-prep the skin and ensure electrodes are firmly attached

     Correct answer: Re-prep the skin and ensure electrodes are firmly attached

     To fix a wandering baseline, the technician should re-prep the skin and ensure the electrodes are firmly attached for stable contact. Increasing paper speed does not address drift, rapid deep breathing worsens respiratory baseline movement, and lowering the temperature can cause shivering.

144. A baseline that drifts upward each time the patient inhales is most consistent with:
     • Respiratory wandering baseline
     • A disconnected lead
     • A pacemaker spike
     • Sixty-cycle interference

     Correct answer: Respiratory wandering baseline

     A baseline that drifts upward with each inhalation is most consistent with a respiratory wandering baseline caused by chest movement. It is not the uniform pattern of AC interference, the flat line of a disconnected lead, or a pacemaker spike, so respiration-related drift is the cause.

145. Sixty-cycle (AC) interference is so named because it reflects the frequency of:
     • Standard alternating-current electrical power in the area
     • The paper feed motor
     • The technician's movement
     • The patient's heartbeat

     Correct answer: Standard alternating-current electrical power in the area

     Sixty-cycle interference is named for the frequency of standard alternating-current electrical power, which is sixty cycles per second in many regions. It does not reflect the heartbeat, the paper feed motor, or technician movement, so the electrical line frequency is the source.

146. Which step most directly reduces 60-cycle interference?
     • Ensuring the machine and outlet are properly grounded
     • Asking the patient to talk
     • Increasing the gain
     • Removing the chest electrodes

     Correct answer: Ensuring the machine and outlet are properly grounded

     Ensuring the machine and outlet are properly grounded most directly reduces 60-cycle interference. Having the patient talk adds artifact, increasing the gain magnifies the interference, and removing chest electrodes loses data without addressing the electrical noise.

147. A tracing has fine, regular interference only when a nearby electric bed motor runs. The best corrective action is to:
     • Reduce the gain to 5 mm/mV
     • Turn off or move away from the bed motor and re-record
     • Reverse the limb leads
     • Continue recording during motor use

     Correct answer: Turn off or move away from the bed motor and re-record

     Because the interference appears with the bed motor, the best action is to turn off or move away from the bed motor and re-record. Continuing during motor use keeps the artifact, reversing leads creates a new error, and reducing the gain does not remove the electrical noise.

148. AC interference can often be reduced by separating the patient cable from:
     • The thermal paper
     • Power cords and other electrical lines
     • The grounding electrode
     • The patient's body

     Correct answer: Power cords and other electrical lines

     Separating the patient cable from power cords and other electrical lines reduces AC interference picked up from them. The cable must stay connected to the patient and the grounding electrode, and the thermal paper is unrelated, so distance from power lines is the corrective step.

149. The first step a technician should take when significant artifact appears on the screen is to:
     • Change the patient's diagnosis
     • Submit the tracing as final
     • Increase the heart rate
     • Identify the type and source of the artifact

     Correct answer: Identify the type and source of the artifact

     The first step is to identify the type and source of the artifact so the correct correction can be applied. Submitting it as final risks misinterpretation, the technician cannot change the heart rate, and diagnosing is outside the technician's role, so identifying the artifact comes first.

150. Matching the artifact to its cause, a flat line in a single lead most likely means:
     • A wandering baseline
     • A loose or disconnected electrode for that lead
     • Sixty-cycle interference
     • Somatic tremor

     Correct answer: A loose or disconnected electrode for that lead

     A flat line confined to one lead most likely means a loose or disconnected electrode for that lead. Somatic tremor produces irregular fuzz, AC interference produces regular fine spikes, and a wandering baseline shows drift, so a single flat lead points to a connection problem.

151. Recognizing artifact rather than misreading it as pathology is important because artifact can mimic:
     • The patient's name label
     • Only the calibration mark
     • The paper speed marker
     • Serious findings such as fibrillation or asystole

     Correct answer: Serious findings such as fibrillation or asystole

     Recognizing artifact matters because it can mimic serious findings such as fibrillation or asystole, leading to false alarms or misdiagnosis. It does not resemble the calibration mark, a name label, or a speed marker, so distinguishing artifact from real pathology protects accuracy.

152. When a single corrective measure does not eliminate artifact, the technician should:
     • Increase the paper speed only
     • Systematically check skin prep, electrodes, cables, patient movement, and electrical sources
     • Assume the patient has a heart problem
     • Stop troubleshooting and submit the strip

     Correct answer: Systematically check skin prep, electrodes, cables, patient movement, and electrical sources

     If one measure fails, the technician should systematically check skin prep, electrodes, cables, patient movement, and electrical sources to find the cause. Submitting a poor strip, only changing paper speed, or assuming pathology would each leave the artifact unresolved or misinterpreted.

153. A clean baseline between complexes on a finished tracing indicates:
     • The gain is too low
     • The leads are reversed
     • The machine is broken
     • Minimal artifact and good recording quality

     Correct answer: Minimal artifact and good recording quality

     A clean baseline between complexes indicates minimal artifact and good recording quality, which is the goal of careful technique. It does not signal a broken machine, low gain, or reversed leads, all of which would produce distortions rather than a clean baseline.

154. When mounting or labeling an EKG, the technician should verify the patient's identity using:
     • At least two identifiers such as name and date of birth
     • The previous patient's chart
     • The technician's memory
     • The room number alone

     Correct answer: At least two identifiers such as name and date of birth

     The technician should verify identity using at least two identifiers, such as name and date of birth, to ensure the tracing is attributed correctly. A room number alone, memory, or the previous patient's chart can lead to misidentification, so two identifiers are the standard.

155. If a recorded EKG is not labeled with the patient's identifying information, the tracing:
     • Is still fully usable
     • Cannot be reliably attributed and may be clinically useless
     • Automatically prints the patient's name
     • Improves in quality

     Correct answer: Cannot be reliably attributed and may be clinically useless

     An unlabeled tracing cannot be reliably attributed to the correct patient and may be clinically useless or dangerous. It is not fully usable, labeling does not improve waveform quality, and the machine does not automatically supply the name, so proper labeling is essential.

156. Documenting any nonstandard settings or lead positions on the tracing helps the interpreter by:
     • Explaining why the tracing may differ from a standard recording
     • Speeding the printout
     • Increasing the gain
     • Hiding the deviation

     Correct answer: Explaining why the tracing may differ from a standard recording

     Documenting nonstandard settings or positions helps the interpreter understand why the tracing may differ from a standard recording. The goal is transparency, not hiding the deviation, and documentation does not affect gain or printout speed, so explanatory notes aid accurate reading.

157. After acquiring the EKG, the technician's appropriate next step regarding interpretation is to:
     • Tell the patient the results
     • Forward the tracing to the qualified provider for interpretation
     • Delete any abnormal-looking strips
     • Write a final diagnosis on the chart

     Correct answer: Forward the tracing to the qualified provider for interpretation

     After acquisition, the technician should forward the tracing to the qualified provider for interpretation, staying within scope. Writing a diagnosis or telling the patient results exceeds the technician's role, and deleting abnormal strips would discard critical clinical data.

158. A technician acquires an EKG that appears to show a dangerous rhythm. Within the acquisition role, the technician should:
     • Wait until the end of the shift to mention it
     • Begin treatment independently
     • Erase and re-record until it looks normal
     • Promptly alert the responsible clinician while ensuring the tracing is preserved

     Correct answer: Promptly alert the responsible clinician while ensuring the tracing is preserved

     The technician should promptly alert the responsible clinician while preserving the tracing, so urgent findings are acted upon. Beginning treatment is outside scope, re-recording to make it look normal falsifies data, and waiting until the shift ends could delay critical care.

159. A technician reviews an inherited tracing where the calibration box is 10 mm and large boxes equal 0.20 second, but lead I shows an inverted P-QRS-T. The most likely issue is:
     • A wrong paper speed
     • A wandering baseline
     • Correct settings but reversed arm electrodes
     • A half-gain setting

     Correct answer: Correct settings but reversed arm electrodes

     With a correct 10 mm calibration and 0.20-second large boxes, an inverted P-QRS-T in lead I most likely indicates reversed arm electrodes rather than a settings error. A wrong paper speed would change box timing, a half-gain setting would shorten complexes, and a wandering baseline causes drift, not inversion.

160. A technician must distinguish whether poor signal is from the patient or the equipment. Switching to a different known-good lead wire and seeing the signal improve indicates the problem was:
     • The patient's heart
     • The room lighting
     • The paper speed
     • The original lead wire or its connection

     Correct answer: The original lead wire or its connection

     If swapping to a known-good lead wire improves the signal, the problem was the original lead wire or its connection. It was not the patient's heart, which would not change with a new wire, and it is unrelated to paper speed or room lighting, so the faulty wire is identified.

161. A patient asks whether the EKG will deliver a shock. The technician should explain that a standard EKG:
     • Only records the heart's electrical activity and does not deliver any shock
     • Delivers a small shock to each electrode
     • Heats the skin to record
     • Replaces the heart's natural rhythm

     Correct answer: Only records the heart's electrical activity and does not deliver any shock

     The technician should explain that a standard EKG only records the heart's electrical activity and does not deliver any shock. It does not shock the electrodes, override the heart's rhythm, or heat the skin to record, so reassuring the patient about its passive nature is correct.

162. To ensure accurate V-lead placement on repeat EKGs over several days, some facilities have the technician:
     • Place leads wherever the prior marks faded to
     • Use a single chest lead only
     • Mark the electrode positions consistently using anatomical landmarks each time
     • Guess the locations each time

     Correct answer: Mark the electrode positions consistently using anatomical landmarks each time

     For consistent serial EKGs, the technician should locate the electrode positions using anatomical landmarks each time so placement is reproducible. Guessing, relying on faded marks, or using a single chest lead would each reduce accuracy and comparability across recordings.

163. A technician notices the precordial complexes change dramatically between two EKGs taken minutes apart on the same patient. Before assuming a cardiac change, the technician should suspect:
     • The patient's name changed
     • The heart physically moved
     • The paper changed color
     • Inconsistent chest-electrode placement between the two recordings

     Correct answer: Inconsistent chest-electrode placement between the two recordings

     A dramatic change in precordial complexes minutes apart should first prompt suspicion of inconsistent chest-electrode placement between the recordings. The heart does not relocate, paper color and the patient's name are irrelevant, so placement consistency is the issue to verify.

164. When the technician applies limb electrodes, choosing flat, fleshy areas over bony or tendinous spots primarily helps to:
     • Change the lead colors
     • Shorten the PR interval
     • Increase signal voltage tenfold
     • Improve contact and reduce motion artifact

     Correct answer: Improve contact and reduce motion artifact

     Choosing flat, fleshy areas improves electrode contact and reduces motion artifact compared with bony or tendinous spots. It does not multiply the signal voltage, change lead colors, or alter the patient's PR interval, so better contact and less artifact are the benefits.

165. A technician records a 12-lead EKG and the machine prints an interpretive statement. The technician should treat this computer interpretation as:
     • The final, confirmed diagnosis
     • A preliminary aid that still requires physician confirmation
     • A reason to alter the tracing
     • Irrelevant and to be ignored entirely

     Correct answer: A preliminary aid that still requires physician confirmation

     The computer interpretation should be treated as a preliminary aid that still requires physician confirmation. It is not a final diagnosis, not a reason to alter the tracing, and not something to ignore entirely, so it supports but does not replace the qualified reader.

166. To acquire a clean tracing on a patient who keeps talking and laughing, the technician should:
     • Record during the laughter
     • Disconnect the limb leads
     • Kindly ask the patient to relax and remain still and quiet during the brief recording
     • Increase the gain to drown out the movement

     Correct answer: Kindly ask the patient to relax and remain still and quiet during the brief recording

     The technician should kindly ask the patient to relax and remain still and quiet during the brief recording to minimize muscle artifact. Increasing the gain amplifies artifact, recording during laughter captures movement, and disconnecting limb leads discards essential data.

167. A standard 12-lead EKG is most accurately described as providing how many physical electrodes and how many electrical views?
     • 12 electrodes and 12 views
     • 10 electrodes and 12 views
     • 10 electrodes and 10 views
     • 12 electrodes and 10 views

     Correct answer: 10 electrodes and 12 views

     A standard 12-lead EKG uses 10 physical electrodes to generate 12 electrical views of the heart. It is not 12 electrodes for 12 views, not 10 views, and not 10 views from 12 electrodes, so the correct pairing is 10 electrodes producing 12 views.

168. A technician preparing a continuous monitoring setup for a mobile patient would most appropriately use:
     • No electrodes at all
     • A reduced-lead telemetry or ambulatory monitor configuration
     • A standard 10-electrode resting 12-lead only
     • Posterior leads V7 through V9 only

     Correct answer: A reduced-lead telemetry or ambulatory monitor configuration

     For continuous monitoring of a mobile patient, a reduced-lead telemetry or ambulatory monitor configuration is most appropriate. A resting 12-lead is for a single snapshot, no electrodes provides no signal, and posterior leads alone are a special diagnostic add-on, not a monitoring setup.

169. A technician obtains a 12-lead EKG and then is asked to add right-sided leads. The technician should keep the existing limb leads and:
     • Reposition the chest electrodes to mirrored right-sided positions and relabel them
     • Switch the paper to a different color
     • Lower the gain to half
     • Remove all chest electrodes permanently

     Correct answer: Reposition the chest electrodes to mirrored right-sided positions and relabel them

     To add right-sided leads, the technician keeps the limb leads and repositions the chest electrodes to mirrored right-sided positions, relabeling them accordingly. Permanently removing chest electrodes, changing paper color, or halving the gain would not produce a correctly labeled right-sided recording.

170. A technician records a tracing where every lead shows uniform fine spikes that vanish when an unplugged nearby device is moved away. This confirms the artifact was:
     • A wandering baseline
     • A normal rhythm
     • Somatic tremor
     • Sixty-cycle electrical interference

     Correct answer: Sixty-cycle electrical interference

     Uniform fine spikes in every lead that vanish when a nearby electrical device is moved away confirm 60-cycle electrical interference. Somatic tremor is irregular, a wandering baseline drifts slowly, and a normal rhythm has no such spikes, so AC interference is confirmed.

171. During acquisition, the technician should ensure the patient's skin and the electrode gel are compatible to avoid:
     • A change in paper speed
     • A faster heart rate
     • An increase in gain
     • Skin irritation or allergic reaction that could also worsen contact

     Correct answer: Skin irritation or allergic reaction that could also worsen contact

     Ensuring skin and gel compatibility helps avoid skin irritation or allergic reaction, which can also worsen electrode contact and the tracing. It does not affect heart rate, paper speed, or gain, so preventing irritation is the relevant concern.

172. A technician should never trim the EKG tracing in a way that removes the:
     • Excess paper at the very end
     • Blank margins
     • Calibration mark, lead labels, or any waveforms
     • Manufacturer logo on the paper

     Correct answer: Calibration mark, lead labels, or any waveforms

     When trimming a tracing, the technician must never remove the calibration mark, lead labels, or any waveforms, since these are needed for interpretation. Blank margins, excess end paper, and a manufacturer logo are not essential, so cutting away the diagnostic content is what must be avoided.

173. A technician is acquiring an EKG and the patient shivers from a cold room. Beyond reassurance, the most direct fix for the resulting tremor artifact is to:
     • Move the electrodes to the wrists
     • Lower the room temperature further
     • Increase the paper speed
     • Provide a blanket and warm the patient so shivering stops

     Correct answer: Provide a blanket and warm the patient so shivering stops

     The most direct fix for shivering-related tremor is to provide a blanket and warm the patient so the shivering stops. Lowering the temperature worsens it, increasing paper speed does not stop muscle activity, and moving electrodes to the wrists increases motion artifact.

174. When acquiring serial EKGs to monitor a patient over time, consistent technique matters most because it allows clinicians to:
     • Skip the calibration mark
     • Avoid using electrodes
     • Attribute changes between tracings to the heart rather than to placement differences
     • Use a slower paper speed

     Correct answer: Attribute changes between tracings to the heart rather than to placement differences

     Consistent technique on serial EKGs lets clinicians attribute changes between tracings to the heart rather than to placement differences. It does not eliminate electrodes, justify skipping calibration, or call for a slower paper speed, so reliable comparison is the key benefit.

175. When acquiring an EKG, placing the V6 electrode too low by one or more intercostal spaces can lead the interpreter to:
     • See a longer paper roll
     • Misjudge the lateral chest-lead pattern
     • Read a faster heart rate
     • Detect a different patient

     Correct answer: Misjudge the lateral chest-lead pattern

     Placing V6 too low alters the lateral chest-lead pattern and can cause the interpreter to misjudge it. It does not change the measured heart rate, the length of the paper roll, or which patient is recorded, so distorted lateral-lead morphology is the consequence.

176. On standard EKG paper running at 25 mm per second, each small box represents how much time, a value the technician uses when measuring intervals?
     • 0.04 seconds
     • 0.20 seconds
     • 0.10 seconds
     • 1.00 second

     Correct answer: 0.04 seconds

     0.04 seconds is correct because at 25 mm per second each 1 mm small box equals four hundredths of a second, the fundamental unit for measuring waveform durations. The 0.20-second value belongs to a large box of five small squares, 0.10 seconds and one full second do not correspond to the single small box.

177. A technician uses the large-box method to estimate rate on a regular rhythm and counts five large boxes between two consecutive R waves. The approximate heart rate is:
     • 100 beats per minute
     • 75 beats per minute
     • 60 beats per minute
     • 150 beats per minute

     Correct answer: 60 beats per minute

     60 beats per minute is correct because dividing 300 by the number of large boxes between R waves gives the rate, and 300 divided by 5 equals 60. Four boxes would give 75, three boxes would give 100, and two boxes would give 150, so five boxes specifically yields 60.

178. When a rhythm is irregular, the technician should estimate the rate by counting the QRS complexes within a 6-second strip and then:
     • Multiplying that count by 10
     • Dividing that count by 6
     • Multiplying that count by 6
     • Dividing 1500 by that count

     Correct answer: Multiplying that count by 10

     Multiplying the count by 10 is correct because a 6-second strip is one tenth of a minute, so the number of complexes in it times ten estimates beats per minute, which is the preferred method for irregular rhythms. Dividing by 6, multiplying by 6, or dividing 1500 by the count would not convert a 6-second sample into a per-minute rate.

179. A normal PR interval, measured from the start of the P wave to the start of the QRS, falls within which range?
     • 0.04 to 0.10 seconds
     • 0.20 to 0.40 seconds
     • 0.12 to 0.20 seconds
     • 0.36 to 0.44 seconds

     Correct answer: 0.12 to 0.20 seconds

     0.12 to 0.20 seconds is correct because this range reflects normal conduction time from atrial depolarization through the AV node to the ventricles. The 0.04 to 0.10 range is too short, while 0.20 to 0.40 and 0.36 to 0.44 describe prolonged values associated with conduction delay rather than a normal PR.

180. A technician measures a PR interval of 0.10 seconds. Compared with the normal range, this PR interval is:
     • Prolonged
     • Exactly normal
     • Shortened
     • Immeasurable

     Correct answer: Shortened

     Shortened is correct because a PR interval below 0.12 seconds is shorter than the normal lower limit, indicating faster-than-usual conduction to the ventricles. A prolonged PR would exceed 0.20 seconds, a normal PR stays between 0.12 and 0.20, and a 0.10-second value is clearly measurable.

181. The normal upper limit for QRS duration that the technician uses to call a complex narrow is:
     • 0.06 seconds
     • 0.20 seconds
     • 0.12 seconds
     • 0.44 seconds

     Correct answer: 0.12 seconds

     0.12 seconds is correct because a QRS lasting less than 0.12 seconds is considered narrow and reflects normal rapid ventricular conduction. A value of 0.06 seconds is well within normal but is not the upper boundary, while 0.20 and 0.44 seconds describe interval values unrelated to the QRS width limit.

182. A technician sees small upright deflections following some T waves on a slow rhythm and identifies them as U waves. The U wave is generally thought to represent:
     • Atrial depolarization
     • The AV nodal delay
     • The late repolarization of ventricular fibers
     • The start of the next P wave

     Correct answer: The late repolarization of ventricular fibers

     Late repolarization of ventricular fibers is correct because the U wave is a small deflection after the T wave attributed to delayed recovery of certain ventricular cells. Atrial depolarization produces the P wave, the AV delay is the PR segment, and the U wave is distinct from the next P wave.

183. When measuring the QT interval, the technician records the distance from the:
     • Start of the P wave to the start of the QRS
     • Peak of the R wave to the peak of the T wave
     • Start of the QRS to the end of the T wave
     • End of the T wave to the next P wave

     Correct answer: Start of the QRS to the end of the T wave

     Start of the QRS to the end of the T wave is correct because the QT interval spans the entire period of ventricular depolarization and repolarization. Start of P to start of QRS defines the PR interval, R peak to T peak is not a standard interval, and the gap after the T wave is the TP segment.

184. A technician notes that the ventricular rhythm on a strip varies slightly with the patient's breathing, speeding up on inspiration and slowing on expiration, with normal sinus P waves throughout. This is best described as:
     • Atrial fibrillation
     • First-degree AV block
     • Sinus arrhythmia
     • Ventricular bigeminy

     Correct answer: Sinus arrhythmia

     Sinus arrhythmia is correct because a phasic variation in sinus rate tied to the respiratory cycle, with normal P waves before each QRS, defines this benign rhythm. Atrial fibrillation lacks organized P waves, first-degree block shows a fixed long PR, and ventricular bigeminy involves alternating premature wide beats.

185. A regular narrow-complex rhythm at 180 beats per minute shows no clearly visible P waves and an abrupt onset. The technician should suspect:
     • Supraventricular tachycardia
     • Sinus bradycardia
     • Ventricular fibrillation
     • Third-degree AV block

     Correct answer: Supraventricular tachycardia

     Supraventricular tachycardia is correct because a fast, regular, narrow-complex rhythm with hidden P waves originating above the ventricles defines this arrhythmia. Sinus bradycardia is slow, ventricular fibrillation is chaotic with no organized complexes, and third-degree block shows independent atrial and ventricular activity.

186. A technician examines a strip and finds the PR interval grows progressively longer with each beat until a P wave appears with no following QRS, then the cycle repeats. This pattern indicates:
     • Second-degree AV block, Mobitz type I (Wenckebach)
     • First-degree AV block
     • Second-degree AV block, Mobitz type II
     • Normal sinus rhythm

     Correct answer: Second-degree AV block, Mobitz type I (Wenckebach)

     Second-degree AV block, Mobitz type I, is correct because the hallmark of Wenckebach is progressive PR lengthening until a beat is dropped, then the cycle restarts. First-degree block has a fixed long PR with no dropped beats, Mobitz type II drops beats with a constant PR, and normal sinus rhythm has no dropped beats.

187. On a strip the PR interval stays constant on conducted beats, but occasionally a P wave is suddenly not followed by a QRS without any prior PR lengthening. This describes:
     • Mobitz type I (Wenckebach)
     • First-degree AV block
     • Mobitz type II second-degree AV block
     • Complete heart block

     Correct answer: Mobitz type II second-degree AV block

     Mobitz type II is correct because it features a fixed PR interval on conducted beats with sudden, intermittent dropped QRS complexes and no progressive lengthening. Wenckebach shows progressive PR prolongation, first-degree block drops no beats, and complete block has no consistent P-to-QRS relationship at all.

188. A technician sees an early beat with a normal-width QRS preceded by a P wave that looks different from the sinus P waves. The most likely identification is a:
     • Premature ventricular contraction
     • Ventricular escape beat
     • Premature atrial contraction
     • Fusion beat

     Correct answer: Premature atrial contraction

     A premature atrial contraction is correct because an early beat with an abnormally shaped P wave and a normal narrow QRS arises from an ectopic atrial focus that still conducts normally to the ventricles. A premature ventricular contraction is wide with no preceding P wave, an escape beat is late, and a fusion beat blends two impulses.

189. A technician identifies three or more consecutive premature ventricular contractions in a row at a fast rate. By definition, this short burst is classified as:
     • Ventricular bigeminy
     • A couplet
     • A run of ventricular tachycardia
     • Atrial flutter

     Correct answer: A run of ventricular tachycardia

     A run of ventricular tachycardia is correct because three or more consecutive ventricular beats in succession meet the definition of ventricular tachycardia, even in a brief run. Bigeminy alternates one normal beat with one PVC, a couplet is exactly two PVCs, and atrial flutter is an atrial sawtooth rhythm.

190. A technician must distinguish two PVCs that have identical shapes from two that look different. PVCs arising from the same ventricular site and sharing one shape are termed:
     • Multifocal
     • Interpolated
     • Unifocal
     • Fusion

     Correct answer: Unifocal

     Unifocal is correct because PVCs that share an identical morphology originate from a single irritable ventricular focus. Multifocal PVCs have differing shapes from multiple sites, an interpolated PVC falls between two normal beats without a compensatory pause, and a fusion beat is a blend of a sinus and ventricular impulse.

191. PVCs that have several different shapes within the same strip are described as multifocal, which concerns the technician more than unifocal PVCs because they suggest:
     • A single benign focus
     • A slowed AV node
     • Greater ventricular irritability from multiple sites
     • Normal respiratory variation

     Correct answer: Greater ventricular irritability from multiple sites

     Greater ventricular irritability from multiple sites is correct because varying PVC shapes indicate impulses originating from several irritable ventricular foci, reflecting a more unstable myocardium. They do not represent a single benign focus, a slowed AV node, or benign respiratory variation.

192. A technician analyzes a rhythm with no P waves, a narrow QRS, and a regular rate of 45 beats per minute, where the QRS sometimes shows an inverted P just before or after it. This points to a:
     • Sinus bradycardia
     • Ventricular escape rhythm
     • Junctional escape rhythm
     • Atrial flutter

     Correct answer: Junctional escape rhythm

     A junctional escape rhythm is correct because an impulse arising from the AV junction produces a narrow QRS with absent or inverted P waves at a slow escape rate around 40 to 60. Sinus bradycardia shows normal upright P waves, a ventricular escape rhythm has wide complexes, and atrial flutter shows sawtooth waves.

193. A monitored patient's strip shows a rate that climbs gradually from 80 to 120 beats per minute over several minutes while maintaining normal upright P waves before each QRS. This gradual increase is characteristic of:
     • Supraventricular tachycardia
     • Atrial fibrillation
     • Sinus tachycardia
     • Ventricular tachycardia

     Correct answer: Sinus tachycardia

     Sinus tachycardia is correct because a gradual, physiologic rise in sinus rate with preserved normal P waves is its typical pattern, often from exertion or stress. Supraventricular tachycardia usually begins and ends abruptly, atrial fibrillation lacks organized P waves, and ventricular tachycardia produces wide complexes.

194. A technician sees normal upright P waves before each QRS at a regular rate of 105 beats per minute with a normal PR and narrow QRS. The correct interpretation is:
     • Normal sinus rhythm
     • Sinus bradycardia
     • Atrial tachycardia
     • Sinus tachycardia

     Correct answer: Sinus tachycardia

     Sinus tachycardia is correct because a sinus-origin rhythm with normal P waves at a rate just over 100 beats per minute defines it. Normal sinus rhythm caps at 100, atrial tachycardia involves an ectopic atrial focus with abnormal P waves, and sinus bradycardia is below 60.

195. A technician compares two T waves and notes one is tall and peaked. Abnormally tall, peaked T waves on an EKG can be an early clue to:
     • Elevated potassium (hyperkalemia)
     • A slowed AV node
     • Atrial enlargement
     • A normal pediatric variant only

     Correct answer: Elevated potassium (hyperkalemia)

     Elevated potassium is correct because tall, peaked T waves are a classic early electrocardiographic sign of hyperkalemia affecting ventricular repolarization. A slowed AV node alters the PR interval, atrial enlargement changes the P wave, and tall peaked T waves are not simply a normal pediatric finding to dismiss.

196. A technician observes an inverted T wave where the normal upright T should be. T-wave inversion in an interpretive context most often suggests:
     • Myocardial ischemia
     • A normal increase in rate
     • A prolonged PR interval
     • Wandering atrial pacemaker

     Correct answer: Myocardial ischemia

     Myocardial ischemia is correct because inverted T waves commonly reflect abnormal ventricular repolarization caused by inadequate blood supply to the heart muscle. A normal rate change, a prolonged PR interval, and a wandering atrial pacemaker affect rate or P-wave behavior, not T-wave polarity in this way.

197. A technician identifies a pathological Q wave, a deep and wide initial downward deflection, on an interpretive strip. A pathological Q wave most commonly indicates:
     • A prior (old) myocardial infarction
     • An acute developing infarction only
     • A normal finding in every lead
     • Atrial fibrillation

     Correct answer: A prior (old) myocardial infarction

     A prior myocardial infarction is correct because a significant pathological Q wave represents an area of dead, electrically silent heart muscle from an older infarct. It is not exclusively an acute finding, is not normal in every lead, and is unrelated to atrial fibrillation, which affects the atrial baseline.

198. A technician reviews a strip with regular sawtooth flutter waves and a consistent 4-to-1 conduction at an atrial rate of 300. The ventricular rate would be approximately:
     • 150 beats per minute
     • 300 beats per minute
     • 100 beats per minute
     • 75 beats per minute

     Correct answer: 75 beats per minute

     About 75 beats per minute is correct because a 4-to-1 conduction means the ventricles respond to every fourth flutter wave, so 300 divided by 4 equals 75. A 2-to-1 ratio would give 150, a 3-to-1 ratio would give 100, and conducting every wave would give 300.

199. When a technician sees atrial flutter with variable conduction, the ventricular rhythm appears irregular. The key feature still confirming flutter rather than fibrillation is the:
     • Absence of any atrial activity
     • Progressively lengthening PR interval
     • Wide bizarre QRS complexes
     • Presence of regular, identical sawtooth flutter waves

     Correct answer: Presence of regular, identical sawtooth flutter waves

     Regular, identical sawtooth flutter waves are correct because even with variable conduction the underlying atrial activity in flutter remains organized and uniform, unlike the chaotic baseline of fibrillation. Absent atrial activity and progressive PR lengthening describe other rhythms, and wide bizarre QRS complexes indicate a ventricular origin.

200. A technician measures a corrected QT interval that is markedly prolonged. Before reporting, the technician recognizes that QT correction is needed because the raw QT depends heavily on the:
     • Heart rate
     • P-wave amplitude
     • ST-segment slope
     • Lead color used

     Correct answer: Heart rate

     Heart rate is correct because the QT interval naturally changes with rate, so a rate-corrected value allows meaningful comparison across different heart rates. P-wave amplitude, ST-segment slope, and lead color do not determine the need to correct the QT measurement.

201. A technician reports a strip showing a flat line briefly interrupted by occasional wide complexes with no P waves in a non-responsive patient. This sporadic wide-complex activity on a near-flat baseline is best described as:
     • Normal sinus rhythm
     • First-degree AV block
     • Atrial flutter
     • An agonal (dying heart) rhythm

     Correct answer: An agonal (dying heart) rhythm

     An agonal rhythm is correct because sporadic, slow, wide complexes on a nearly flat baseline reflect a dying heart producing only occasional ineffective beats. Normal sinus rhythm has organized P-QRS-T cycles, atrial flutter has sawtooth waves, and first-degree block conducts every beat with a long PR.

202. A technician notes that during atrial fibrillation the fibrillatory baseline between QRS complexes is best described as:
     • Smooth and flat
     • A series of tall peaked waves
     • Evenly spaced sawtooth waves
     • A fine to coarse irregular wavering line with no distinct P waves

     Correct answer: A fine to coarse irregular wavering line with no distinct P waves

     A fine to coarse irregular wavering line with no distinct P waves is correct because atrial fibrillation produces chaotic atrial activity that appears as an undulating baseline rather than organized waves. A flat baseline would suggest a different rhythm, evenly spaced sawtooth waves indicate flutter, and tall peaked waves are not characteristic of fibrillation.

203. A technician identifies a regular wide-complex tachycardia in which all the wide QRS complexes look the same. This uniform wide-complex pattern is termed:
     • Polymorphic ventricular tachycardia
     • Atrial flutter
     • Torsades de pointes
     • Monomorphic ventricular tachycardia

     Correct answer: Monomorphic ventricular tachycardia

     Monomorphic ventricular tachycardia is correct because all the wide QRS complexes sharing a single, consistent shape define the monomorphic form. Polymorphic VT and torsades de pointes show changing or twisting complex shapes, and atrial flutter is a narrow-complex atrial rhythm with sawtooth waves.

204. A technician sees a ventricular tachycardia in which the QRS complexes appear to twist and change amplitude around the baseline. This specific pattern, often linked to a prolonged QT, is called:
     • Monomorphic ventricular tachycardia
     • Atrial fibrillation
     • Ventricular bigeminy
     • Torsades de pointes

     Correct answer: Torsades de pointes

     Torsades de pointes is correct because this polymorphic ventricular tachycardia shows QRS complexes that twist around the baseline and is classically associated with QT prolongation. Monomorphic VT has uniform complexes, bigeminy alternates normal and premature beats, and atrial fibrillation is an irregular atrial rhythm.

205. A technician measures a rate of 58 beats per minute on a regular rhythm with normal upright P waves and a PR of 0.16 seconds. This rhythm is correctly identified as:
     • Normal sinus rhythm
     • First-degree AV block
     • Junctional rhythm
     • Sinus bradycardia

     Correct answer: Sinus bradycardia

     Sinus bradycardia is correct because a sinus-origin rhythm with normal P waves and a normal PR at a rate below 60 beats per minute defines it. Normal sinus rhythm starts at 60, a junctional rhythm lacks normal upright P waves, and first-degree block requires a PR longer than 0.20 seconds.

206. A technician analyzing intervals knows the ST segment connects the:
     • End of the P wave to the start of the QRS
     • End of the T wave to the next P wave
     • Peak of the R wave to the peak of the T wave
     • End of the QRS (J point) to the start of the T wave

     Correct answer: End of the QRS (J point) to the start of the T wave

     The end of the QRS, at the J point, to the start of the T wave is correct because the ST segment represents the brief plateau between ventricular depolarization and the beginning of repolarization. The end of P to start of QRS is the PR segment, R-to-T peak is not a standard measure, and end of T to next P is the TP segment.

207. A technician must decide whether ST elevation is clinically significant. Conventionally, ST elevation is measured relative to the:
     • Peak of the preceding R wave
     • Deepest point of the Q wave
     • Tip of the T wave
     • Isoelectric baseline (such as the TP or PR segment)

     Correct answer: Isoelectric baseline (such as the TP or PR segment)

     The isoelectric baseline is correct because ST deviation is judged by how far the segment sits above or below the flat baseline established by the TP or PR segment. The R-wave peak, T-wave tip, and Q-wave nadir are not the reference points for measuring ST shift.

208. A technician observes a rhythm where every other beat is a premature ventricular contraction, alternating regularly with normal beats. Beyond bigeminy, if instead a PVC follows every two normal beats, the pattern is called:
     • Trigeminy
     • Quadrigeminy
     • A couplet
     • A salvo

     Correct answer: Trigeminy

     Trigeminy is correct because the repeating pattern of two normal beats followed by one PVC, grouping beats in threes, defines it. Quadrigeminy groups in fours, a couplet is two PVCs together, and a salvo refers to a short burst of three or more PVCs.

209. A technician finds a normal-appearing strip but notices the P waves are inverted in lead II where they should be upright. Inverted P waves in lead II suggest the impulse is:
     • Originating normally from the SA node
     • Arising from a site other than the SA node, such as the AV junction
     • Blocked completely at the AV node
     • A normal finding requiring no thought

     Correct answer: Arising from a site other than the SA node, such as the AV junction

     Arising from a site other than the SA node is correct because a normal sinus impulse produces an upright P wave in lead II, so inversion implies an ectopic origin like the AV junction conducting backward into the atria. It is not a normal sinus origin, not a complete block, and not a finding to ignore.

210. A technician examines a strip with two P waves before each QRS at a regular ventricular rate, with the conducted PR interval constant. This 2-to-1 pattern of P waves to QRS indicates a form of:
     • First-degree AV block
     • Second-degree AV block (2-to-1 conduction)
     • Normal sinus rhythm
     • Sinus arrhythmia

     Correct answer: Second-degree AV block (2-to-1 conduction)

     Second-degree AV block with 2-to-1 conduction is correct because only every other P wave conducts to produce a QRS, so some atrial impulses are blocked while others conduct. First-degree block conducts every beat, normal sinus rhythm has one P per QRS, and sinus arrhythmia is a respiratory rate variation with one-to-one conduction.

211. A technician determines that a P wave is abnormally tall and peaked. A tall, peaked P wave most often reflects:
     • Right atrial enlargement
     • Ventricular hypertrophy
     • A normal newborn finding only
     • AV nodal delay

     Correct answer: Right atrial enlargement

     Right atrial enlargement is correct because increased right atrial mass produces a taller, more peaked P wave as atrial depolarization is exaggerated. Ventricular hypertrophy alters the QRS, a peaked P is not simply a normal newborn finding, and AV nodal delay affects the PR interval rather than P-wave shape.

212. A technician compares a wide, notched P wave (often in lead II) to a normal P wave. A wide, notched P wave commonly indicates:
     • Left atrial enlargement
     • A premature ventricular contraction
     • Ventricular tachycardia
     • A shortened QT interval

     Correct answer: Left atrial enlargement

     Left atrial enlargement is correct because delayed left atrial activation produces a widened, often notched P wave reflecting prolonged atrial depolarization. A premature ventricular contraction is a wide QRS event, ventricular tachycardia is a wide-complex rhythm, and a shortened QT relates to repolarization timing, not P-wave shape.

213. A technician evaluates a regular rhythm and confirms the R-R intervals are equal across the entire strip. Equal R-R intervals tell the technician the ventricular rhythm is:
     • Irregularly irregular
     • Regular
     • Chaotic
     • Absent

     Correct answer: Regular

     Regular is correct because consistent, equal spacing between consecutive R waves is the definition of a regular ventricular rhythm. Irregularly irregular spacing characterizes atrial fibrillation, chaotic deflections describe fibrillation, and absent activity describes asystole.

214. A technician sees a regular narrow-complex rhythm at 65 beats per minute but cannot find any P waves at all, with a normal QRS. The most likely interpretation is a:
     • Accelerated junctional rhythm
     • Ventricular tachycardia
     • Atrial flutter
     • First-degree AV block

     Correct answer: Accelerated junctional rhythm

     An accelerated junctional rhythm is correct because a junctional pacemaker firing faster than its usual escape rate produces a narrow-complex rhythm around 60 to 100 with absent or hidden P waves. Ventricular tachycardia has wide complexes, atrial flutter shows sawtooth waves, and first-degree block preserves upright P waves with a long PR.

215. A technician evaluates a strip and finds that the QRS complexes are wide and bizarre while the P waves, when visible, march out at their own slower, independent rate with no fixed link to the QRS. This dissociation between P waves and QRS complexes defines:
     • First-degree AV block
     • Mobitz type I block
     • Sinus arrhythmia
     • Third-degree (complete) AV block

     Correct answer: Third-degree (complete) AV block

     Third-degree (complete) AV block is correct because complete dissociation, with the atria and ventricles each paced independently and no consistent P-to-QRS relationship, is its defining feature. First-degree block conducts every beat with a long PR, Mobitz type I shows progressive PR lengthening before a dropped beat, and sinus arrhythmia keeps one-to-one conduction.

216. A technician sees an early, narrow QRS that is not preceded by any P wave at all, arising from the AV junction. This early beat is a:
     • Premature ventricular contraction
     • Premature junctional contraction
     • Sinus beat
     • Ventricular escape beat

     Correct answer: Premature junctional contraction

     A premature junctional contraction is correct because an early narrow-complex beat from the AV junction can occur with an absent, inverted, or hidden P wave while keeping the QRS narrow. A premature ventricular contraction is wide, a sinus beat originates from the SA node on time, and an escape beat occurs late rather than early.

217. A technician interprets a strip showing a rate of 30 beats per minute, wide QRS complexes, and no P waves, in an unresponsive patient. This slow, wide-complex rhythm is best described as a:
     • Junctional escape rhythm
     • Ventricular (idioventricular) escape rhythm
     • Sinus bradycardia
     • Supraventricular tachycardia

     Correct answer: Ventricular (idioventricular) escape rhythm

     A ventricular escape rhythm is correct because a slow rate near 20 to 40 with wide QRS complexes and absent P waves reflects a ventricular pacemaker taking over when higher pacemakers fail. A junctional escape rhythm has narrow complexes, sinus bradycardia shows normal P waves, and supraventricular tachycardia is fast and narrow.

218. A technician must report a 6-second strip but the rhythm changes partway through. The most accurate approach to interpretation is to:
     • Report only the first rhythm seen
     • Describe both rhythms present on the strip
     • Report whichever rhythm is fastest
     • Discard the strip entirely

     Correct answer: Describe both rhythms present on the strip

     Describing both rhythms present is correct because an accurate interpretation documents any change in rhythm so the provider sees the full picture. Reporting only the first or the fastest rhythm omits clinically important information, and discarding the strip would lose valid recorded data.

219. A technician sees a regular rhythm where some normal beats are interrupted by a pause exactly equal to two normal cycles, with a P wave entirely missing during the pause. This is most consistent with a:
     • Sinus block (sinus arrest of one beat)
     • Premature atrial contraction
     • Ventricular tachycardia
     • First-degree AV block

     Correct answer: Sinus block (sinus arrest of one beat)

     A sinus block is correct because the SA node fails to fire for a beat, creating a pause that is a multiple of the underlying cycle with the entire P-QRS-T missing. A premature atrial contraction is an early extra beat, ventricular tachycardia is fast and wide, and first-degree block only lengthens the PR without a pause.

220. A technician analyzes a wide-complex tachycardia and observes occasional normal-width beats interspersed (capture beats) and beats of intermediate width (fusion beats). These findings most strongly support:
     • Supraventricular tachycardia
     • Ventricular tachycardia
     • Atrial fibrillation
     • Normal sinus rhythm

     Correct answer: Ventricular tachycardia

     Ventricular tachycardia is correct because capture and fusion beats reflect occasional sinus impulses reaching the ventricles during a ventricular rhythm, a strong clue distinguishing VT from a supraventricular source. Supraventricular tachycardia and normal sinus rhythm have consistent narrow complexes, and atrial fibrillation is irregularly irregular.

221. A technician needs to determine whether ventricular fibrillation is coarse or fine. The distinction matters because, in general, coarse ventricular fibrillation has:
     • No electrical activity
     • Larger-amplitude chaotic deflections than fine ventricular fibrillation
     • Organized sawtooth waves
     • A regular wide-complex pattern

     Correct answer: Larger-amplitude chaotic deflections than fine ventricular fibrillation

     Larger-amplitude chaotic deflections are correct because coarse ventricular fibrillation shows bigger erratic waves than the smaller deflections of fine fibrillation. Both forms still show chaotic activity rather than no activity, neither has organized sawtooth waves, and neither is a regular wide-complex rhythm.

222. A technician interpreting a strip sees normal P waves, a normal PR, but the QRS shows a wide, slurred pattern with a duration of 0.14 seconds in a regular rhythm. This most likely represents a:
     • Bundle branch block
     • Premature atrial contraction
     • First-degree AV block
     • Sinus arrhythmia

     Correct answer: Bundle branch block

     A bundle branch block is correct because a widened QRS of 0.12 seconds or more with normal P waves and PR reflects delayed conduction through one of the bundle branches. A premature atrial contraction is an early narrow beat, first-degree block widens the PR not the QRS, and sinus arrhythmia is a normal-width respiratory variation.

223. A technician measures the atrial rate using P-to-P intervals and the ventricular rate using R-to-R intervals on a strip and finds they are different. Measuring atrial and ventricular rates separately is most important when evaluating:
     • Normal sinus rhythm
     • AV blocks where conduction may be impaired
     • A calibration error
     • Sinus tachycardia

     Correct answer: AV blocks where conduction may be impaired

     AV blocks are correct because when atrial impulses fail to conduct, the atrial and ventricular rates diverge, so each must be measured separately to classify the block. In normal sinus rhythm and sinus tachycardia the rates match, and a calibration error is an equipment issue, not a rate-relationship question.

224. A technician notes regular flutter waves but the ventricular response is completely irregular. Atrial flutter with variable conduction differs from atrial fibrillation chiefly because flutter shows:
     • A chaotic baseline with no pattern
     • Consistent, evenly spaced atrial waves despite the irregular ventricular rate
     • Wide bizarre QRS complexes
     • Completely absent atrial activity

     Correct answer: Consistent, evenly spaced atrial waves despite the irregular ventricular rate

     Consistent, evenly spaced atrial waves are correct because flutter maintains a regular organized atrial circuit even when the AV node conducts irregularly, unlike the chaotic atrial baseline of fibrillation. The other options describe fibrillation, ventricular rhythms, or asystole rather than flutter.

225. A technician identifies a regular rhythm with an atrial rate of 150 and identical, abnormally shaped P waves that differ from sinus P waves, conducting one-to-one to narrow QRS complexes. This is most consistent with:
     • Sinus tachycardia
     • Atrial tachycardia
     • Atrial fibrillation
     • Ventricular tachycardia

     Correct answer: Atrial tachycardia

     Atrial tachycardia is correct because a fast, regular rhythm driven by an ectopic atrial focus produces uniform but abnormally shaped P waves distinct from sinus P waves. Sinus tachycardia has normal-shaped P waves, atrial fibrillation lacks organized P waves, and ventricular tachycardia produces wide complexes.

226. A technician compares a normal QRS amplitude with a strip showing very tall R waves and deep S waves. Markedly increased QRS voltage most commonly suggests:
     • Ventricular hypertrophy
     • A prolonged PR interval
     • Atrial fibrillation
     • A wandering atrial pacemaker

     Correct answer: Ventricular hypertrophy

     Ventricular hypertrophy is correct because thickened ventricular muscle generates larger electrical forces, producing taller R waves and deeper S waves. A prolonged PR reflects AV delay, atrial fibrillation affects the atrial baseline, and a wandering atrial pacemaker changes P-wave shape rather than QRS voltage.

227. A technician sees a strip with a normal rate and rhythm but a downsloping ST segment that dips well below the baseline during a stress recording. Within scope, the technician should:
     • Interpret it as definitive coronary disease
     • Document the ST depression and report it to the supervising clinician
     • Delete the segment as artifact
     • Instruct the patient on treatment options

     Correct answer: Document the ST depression and report it to the supervising clinician

     Documenting the ST depression and reporting it is correct because the technician records and communicates the finding while leaving diagnosis to the clinician. Interpreting it as definitive disease or instructing on treatment exceeds scope, and deleting a real finding as artifact would hide clinically important data.

228. A technician analyzing a pediatric strip recalls that normal heart rates are higher in infants than adults. When applying interpretation criteria, the technician should remember that a rate of 130 in a healthy infant is:
     • Abnormal tachycardia requiring escalation
     • Within the expected normal range for that age
     • Evidence of ventricular tachycardia
     • The same threshold used for adults

     Correct answer: Within the expected normal range for that age

     Within the expected normal range for that age is correct because infants normally have faster resting heart rates than adults, so age-appropriate norms must be applied during interpretation. It is not automatically abnormal, is not ventricular tachycardia given normal narrow complexes, and the adult threshold of 100 does not apply to infants.

229. A technician studying a regular rhythm wants to confirm normal AV conduction. The finding that best confirms each atrial impulse is conducting normally to the ventricles is:
     • Absent P waves with a wide QRS
     • A sawtooth atrial baseline
     • An irregularly irregular ventricular response
     • One upright P wave preceding each QRS with a constant normal PR interval

     Correct answer: One upright P wave preceding each QRS with a constant normal PR interval

     One upright P wave preceding each QRS with a constant normal PR is correct because consistent one-to-one conduction with a normal PR interval confirms the impulse travels normally from atria to ventricles. Absent P waves with a wide QRS, a sawtooth baseline, and an irregularly irregular response all indicate abnormal rhythms rather than normal conduction.

230. A technician reviewing an interpretive strip recalls that the first negative deflection after the P wave, when present, is named the Q wave. The very first upward deflection of the ventricular complex is named the:
     • S wave
     • T wave
     • U wave
     • R wave

     Correct answer: R wave

     The R wave is correct because by convention the first upward (positive) deflection of the ventricular complex is labeled the R wave. The S wave is the negative deflection following the R wave, while the T and U waves are repolarization waves that appear after the QRS, not part of its initial upstroke.

231. A technician needs to recognize the lethal rhythm requiring the most urgent escalation. Among the following, the rhythm that produces no effective cardiac output and is immediately life-threatening is:
     • Sinus bradycardia
     • First-degree AV block
     • Sinus arrhythmia
     • Ventricular fibrillation

     Correct answer: Ventricular fibrillation

     Ventricular fibrillation is correct because its chaotic, disorganized ventricular activity prevents any coordinated contraction, producing no pulse and demanding immediate escalation. Sinus bradycardia, first-degree AV block, and sinus arrhythmia are all organized rhythms that still generate cardiac output.