NHA Certified EKG Technician (CET) — Questions and Answers

Question 1: A Certified ECG Technician wants to advance into cardiac monitoring. Which credential would BEST support that transition?

Certified Nursing Assistant (CNA)
Certified Medical Assistant (CMA)
Certified Cardiographic Technician (CCT) (Correct answer)
Certified Phlebotomy Technician (CPT)

Correct answer: Certified Cardiographic Technician (CCT)

The CCT credential, awarded by CCI, is the recognized advanced certification for cardiac monitoring roles beyond basic ECG.

Question 2: A 45-year-old woman has an ECG showing delta waves and a short PR interval. She is asymptomatic. What is the appropriate management?

Immediate ablation
Start amiodarone
No treatment needed as all WPW is benign
Electrophysiology study referral for risk stratification (Correct answer)

Correct answer: Electrophysiology study referral for risk stratification

Asymptomatic WPW requires electrophysiology study to assess the refractory period of the accessory pathway and risk of sudden death.

Question 3: What is the standard paper speed for ECG recording?

50 mm/sec
10 mm/sec
25 mm/sec (Correct answer)
100 mm/sec

Correct answer: 25 mm/sec

Standard ECG paper speed is 25 mm/second, where each small box represents 0.04 seconds and each large box represents 0.20 seconds.

Question 4: What does the term 'ambulatory' mean in the context of ambulatory ECG monitoring?

The patient is monitored only during emergency transport
Monitoring occurs exclusively during structured walking exercises
The ECG is analyzed remotely by a physician in real time
The patient can move around freely and perform normal activities during the recording (Correct answer)

Correct answer: The patient can move around freely and perform normal activities during the recording

Ambulatory refers to the patient's ability to move freely and continue normal daily activities during monitoring, unlike stationary hospital telemetry systems.

Question 5: What does the P wave on an ECG represent?

Ventricular depolarization
Atrial repolarization
Atrial depolarization (Correct answer)
Ventricular repolarization

Correct answer: Atrial depolarization

The P wave represents the electrical depolarization spreading through the atria, triggering atrial contraction.

Question 6: What is the primary purpose of continuous cardiac monitoring in a hospital setting?

Tracking blood pressure trends
Monitoring respiratory rate
Early detection of life-threatening arrhythmias (Correct answer)
Measuring blood oxygen levels

Correct answer: Early detection of life-threatening arrhythmias

Continuous cardiac monitoring is used to detect dangerous arrhythmias early so that timely intervention can be initiated.

Question 7: What is the primary functional difference between a Holter monitor and a cardiac event recorder?

A Holter records continuously; an event recorder captures only symptom-triggered or auto-detected events (Correct answer)
An event recorder records exactly 24 hours; a Holter records only during exercise
A Holter requires physician presence; an event recorder does not
Event recorders measure blood pressure; Holters measure only rhythm

Correct answer: A Holter records continuously; an event recorder captures only symptom-triggered or auto-detected events

Holter monitors record the ECG continuously over the entire monitoring period, while cardiac event recorders only capture specific events triggered manually by the patient or automatically by arrhythmia detection algorithms.

Question 8: A patient's ECG shows PR interval of 320 ms that is constant across all beats. How is this classified?

First-degree AV block (Correct answer)
Second-degree AV block Mobitz II
Second-degree AV block Mobitz I
Third-degree AV block

Correct answer: First-degree AV block

First-degree AV block is defined as a PR interval greater than 200 ms that remains constant with every beat conducted through the AV node.

Question 9: What does the Osborn wave (J wave) on ECG suggest?

Hyperthermia
Hypothermia (Correct answer)
Pulmonary embolism
Hyperkalemia

Correct answer: Hypothermia

An Osborn (J) wave is a positive deflection at the J-point and is a hallmark ECG finding in hypothermia.

Question 10: What does reciprocal change mean on an ECG?

P waves appearing after QRS complexes
T wave inversion in limb leads only
ST depression in leads opposite to those showing ST elevation (Correct answer)
Identical changes in all 12 leads

Correct answer: ST depression in leads opposite to those showing ST elevation

Reciprocal changes are ST depressions seen in leads opposite to the primary area of ST elevation during acute MI, helping confirm the diagnosis and localize the infarct.

Question 11: An ECG technician is preparing a professional portfolio for a job promotion. Which item would be MOST valuable to include?

A log of scheduled vacation days
Copies of general workplace policies
Documentation of completed CE courses, certifications, and competency assessments (Correct answer)
A list of personal hobbies

Correct answer: Documentation of completed CE courses, certifications, and competency assessments

A portfolio demonstrating CE completion, certifications, and competency assessments provides concrete evidence of professional growth to hiring managers.

Question 12: An ECG technician observes a 60-cycle (60 Hz) interference pattern on the tracing. Which corrective measure is most appropriate?

Check electrode contact and ensure leads are not crossing electrical equipment (Correct answer)
Switch from AC to DC mode on the ECG machine
Replace the ECG paper
Increase the paper speed

Correct answer: Check electrode contact and ensure leads are not crossing electrical equipment

60 Hz AC interference is caused by poor electrode contact or proximity to electrical equipment; improving electrode contact and repositioning cables eliminates this artifact.

Question 13: Which rhythm shows regularly irregular RR intervals with a pattern of progressive RR shortening followed by a pause?

Atrial fibrillation
Sinus arrhythmia
Wenckebach (Mobitz I) block (Correct answer)
Junctional rhythm

Correct answer: Wenckebach (Mobitz I) block

Wenckebach block shows progressive PR lengthening and RR shortening until a P wave is not conducted, creating the characteristic grouped beating.

Question 14: Which body of knowledge area makes up the LARGEST portion of the NHA CET exam?

Medical billing and coding
ECG acquisition and troubleshooting (Correct answer)
Anatomy and physiology of the heart
Cardiac medications

Correct answer: ECG acquisition and troubleshooting

ECG acquisition and troubleshooting is the highest-weighted domain on the CET exam, reflecting the technician's core duty.

Question 15: During the absolute refractory period of a cardiac cell, what is true?

A supranormal stimulus can trigger an action potential
Repolarization is complete
No stimulus can trigger a new action potential (Correct answer)
Only high-energy defibrillation can trigger depolarization

Correct answer: No stimulus can trigger a new action potential

During the absolute refractory period, Na+ channels are inactivated and no stimulus, regardless of strength, can generate a new action potential.

Question 16: A patient has a narrow complex tachycardia at 180 bpm that terminates abruptly with Valsalva maneuver. What is the most likely diagnosis?

AV nodal reentrant tachycardia (AVNRT) (Correct answer)
Sinus tachycardia
Ventricular tachycardia
Atrial fibrillation

Correct answer: AV nodal reentrant tachycardia (AVNRT)

AVNRT is a reentrant circuit involving the AV node that terminates with vagal maneuvers or adenosine due to AV nodal dependence.

Question 17: What is the safe current limit to prevent microshock injury in a patient with an intracardiac catheter?

50 microamperes (50 µA)
10 microamperes (10 µA) (Correct answer)
100 milliamperes (100 mA)
1 milliampere (1 mA)

Correct answer: 10 microamperes (10 µA)

Patients with direct cardiac connections (e.g., pacemaker leads) are at risk of microshock; the safe limit is 10 µA.

Question 18: A digitalis-toxic patient presents with a rapid irregular rhythm and varying block. What ECG rhythm is classic for digoxin toxicity?

Atrial fibrillation with rapid ventricular response
Atrial flutter with 2:1 block
Torsades de pointes
Paroxysmal atrial tachycardia with variable block (Correct answer)

Correct answer: Paroxysmal atrial tachycardia with variable block

PAT with variable block (atrial tachycardia with varying AV conduction) is the classic and pathognomonic ECG sign of digoxin toxicity.

Question 19: Which electrolyte abnormality produces tall, peaked T waves on ECG?

Hyperkalemia (Correct answer)
Hyponatremia
Hypercalcemia
Hypokalemia

Correct answer: Hyperkalemia

Hyperkalemia characteristically produces tall, narrow, peaked T waves, especially in precordial leads.

Question 20: An employer sponsors an ECG technician's certification exam fees. Who is still ultimately responsible for meeting eligibility requirements?

The certifying body waives requirements for sponsored candidates
The sponsoring employer
The physician supervising the technician
The candidate/technician (Correct answer)

Correct answer: The candidate/technician

Regardless of who pays for the exam, the individual candidate bears full responsibility for meeting all eligibility requirements and submitting accurate documentation.

Question 21: When recording a right-sided ECG (V3R-V6R), what is the primary clinical indication?

Suspected right ventricular MI in the setting of inferior STEMI (Correct answer)
Assessment of posterior wall motion
Suspected left ventricular aneurysm
Evaluation of left bundle branch block

Correct answer: Suspected right ventricular MI in the setting of inferior STEMI

Right-sided leads are obtained when inferior STEMI is present to detect right ventricular involvement, which changes management (avoid nitrates and diuretics).

Question 22: Which property describes a cell's ability to respond to a stimulus and generate an action potential?

Contractility
Conductivity
Automaticity
Excitability (bathmotropy) (Correct answer)

Correct answer: Excitability (bathmotropy)

Excitability (bathmotropy) is the ability of cardiac cells to respond to an electrical stimulus and generate an action potential when threshold is reached.

Question 23: Where should the V4 precordial electrode be placed?

Fourth intercostal space right sternal border
Fifth intercostal space at the midclavicular line (Correct answer)
Fifth intercostal space at the anterior axillary line
Second intercostal space left sternal border

Correct answer: Fifth intercostal space at the midclavicular line

V4 is placed at the fifth intercostal space at the midclavicular line, serving as the reference point for V5 and V6 placement.

Question 24: What pause duration is generally considered clinically significant during Holter analysis?

A pause greater than 2.0 to 2.5 seconds (Correct answer)
Any pause occurring exclusively during sleep
A pause greater than 5.0 seconds only
Any pause greater than 1.0 second

Correct answer: A pause greater than 2.0 to 2.5 seconds

A cardiac pause exceeding 2.0 to 2.5 seconds is generally considered clinically significant and is flagged for physician review during Holter analysis.

Question 25: A patient receiving digoxin shows scooped ST-segment depression on ECG. What is this called?

Reciprocal change
Digitalis effect (Correct answer)
ST injury pattern
Digoxin toxicity

Correct answer: Digitalis effect

The scooped or 'Salvador Dali mustache' ST depression is the classic digitalis effect, a predictable pharmacologic ECG change.

Question 26: Which ECG change is most specific for pulmonary embolism?

Prolonged PR interval
Complete LBBB
S1Q3T3 pattern (Correct answer)
ST elevation in V1-V3

Correct answer: S1Q3T3 pattern

The S1Q3T3 pattern (S wave in I, Q wave and T wave inversion in III) suggests acute right heart strain from pulmonary embolism.

Question 27: What is the difference between depolarization and repolarization?

Depolarization is electrical activation; repolarization is electrical recovery (Correct answer)
Depolarization occurs only in atria
Repolarization occurs only in ventricles
They are the same process

Correct answer: Depolarization is electrical activation; repolarization is electrical recovery

Depolarization is the process where cardiac cells become electrically activated (less negative), triggering contraction. Repolarization is the recovery process returning cells to their resting state.

Question 28: What is the MOST effective way for an ECG technician to build a professional network that supports career advancement?

Attend cardiovascular conferences, join professional associations, and engage with peers on professional platforms like LinkedIn (Correct answer)
Limit communication to within the immediate department only
Avoid interaction with colleagues from competing hospitals
Network exclusively with physicians and exclude other allied health professionals

Correct answer: Attend cardiovascular conferences, join professional associations, and engage with peers on professional platforms like LinkedIn

Active engagement through conferences, professional associations, and online platforms broadens connections that can lead to mentorship, referrals, and new opportunities.

Question 29: Which finding on an ECG rhythm strip confirms a pacemaker is functioning in demand mode?

Pacemaker spikes appear only when the intrinsic heart rate drops below the programmed rate (Correct answer)
No pacemaker spikes are visible
Pacemaker spikes appear before every QRS complex
Pacemaker spikes are randomly distributed

Correct answer: Pacemaker spikes appear only when the intrinsic heart rate drops below the programmed rate

Demand pacemakers sense intrinsic activity and fire only when the heart rate falls below the set rate, inhibiting output when native beats are sensed.

Question 30: Which of the following is the PRIMARY reason certification bodies require continuing education (CE) for ECG renewal?

To comply with IRS regulations for professional organizations
To generate revenue for the certifying organization
To limit the number of active certified technicians
To ensure technicians stay current with evolving ECG standards and clinical practices (Correct answer)

Correct answer: To ensure technicians stay current with evolving ECG standards and clinical practices

Continuing education ensures that ECG technicians maintain current knowledge as cardiac monitoring technology and clinical guidelines evolve.

Question 31: What is the purpose of the P wave in an ECG tracing?

Indicates atrial depolarization (Correct answer)
Displays ventricular repolarization
Represents ventricular depolarization
Shows atrial repolarization

Correct answer: Indicates atrial depolarization

In an ECG tracing, the P wave represents the electrical activity associated with atrial depolarization. This is when the electrical impulse, originating from the SA node, spreads across the atria, causing them to contract and pump blood into the ventricles. It is the first positive deflection seen on a normal ECG.

Question 32: Digoxin toxicity on an ECG most commonly presents as which rhythm?

Sinus tachycardia
PVCs with bigeminy (Correct answer)
Atrial flutter
Right bundle branch block

Correct answer: PVCs with bigeminy

Digoxin toxicity classically causes increased automaticity and AV block, manifesting as PVCs and bigeminy on the ECG.

Question 33: Which AAMI/IEC standard governs ECG electrode performance requirements in the US?

ANSI/AAMI ES60601
ISO 13485
IEC 60601-1
AAMI EC12 (Correct answer)

Correct answer: AAMI EC12

AAMI EC12 is the US standard specifying performance requirements for disposable ECG electrodes.

Question 34: A normal PR interval ranges from:

0.12 to 0.20 seconds (Correct answer)
0.06 to 0.10 seconds
0.40 to 0.60 seconds
0.24 to 0.36 seconds

Correct answer: 0.12 to 0.20 seconds

The normal PR interval is 0.12-0.20 seconds (3-5 small boxes), representing the time from atrial depolarization to ventricular depolarization.

Question 35: A patient has ST elevation in leads V1-V4 with reciprocal ST depression in the inferior leads. Which vessel is most likely involved?

Right coronary artery (proximal)
Left circumflex artery
Left anterior descending artery (Correct answer)
Posterior descending artery

Correct answer: Left anterior descending artery

ST elevation in V1-V4 indicates anterior STEMI, most commonly due to LAD occlusion, with reciprocal changes often in inferior leads.

Question 36: What does an increased 'total AF burden' percentage on a Holter report indicate?

The patient spent a greater proportion of monitored time in atrial fibrillation (Correct answer)
The Holter had poor electrode contact during the recording
The patient's activity level exceeded the normal exercise range
The patient's QRS duration is prolonged throughout the recording

Correct answer: The patient spent a greater proportion of monitored time in atrial fibrillation

AF burden represents the percentage of total monitored time the patient spent in atrial fibrillation; an increased burden indicates more frequent or longer duration AF episodes during the recording period.

Question 37: Which organization provides guidelines for in-hospital cardiac monitoring practice in the US?

American Medical Association (AMA)
Joint Commission (TJC)
American Heart Association (AHA) (Correct answer)
Centers for Medicare and Medicaid Services (CMS)

Correct answer: American Heart Association (AHA)

The AHA publishes evidence-based practice standards for in-hospital cardiac monitoring.

Question 38: Which condition requires telemetry monitoring according to AHA Class II guidelines?

Isolated hypertension without cardiac history
Stable angina with no recent change in symptoms
Post-op hernia repair in a healthy 30-year-old
Newly diagnosed heart failure with reduced ejection fraction (Correct answer)

Correct answer: Newly diagnosed heart failure with reduced ejection fraction

New heart failure with reduced ejection fraction carries risk of arrhythmias, making it an AHA Class II monitoring indication.

Question 39: Which calcium channel blocker is preferred for rate control in atrial fibrillation because it primarily acts on the AV node?

Nifedipine
Diltiazem (Correct answer)
Amlodipine
Nicardipine

Correct answer: Diltiazem

Diltiazem is a non-dihydropyridine calcium channel blocker that preferentially slows AV nodal conduction, making it effective for rate control.

Question 40: What does a delta wave on an ECG indicate?

Right bundle branch block
Hypercalcemia
Pre-excitation via an accessory pathway (Wolff-Parkinson-White syndrome) (Correct answer)
Hyperkalemia

Correct answer: Pre-excitation via an accessory pathway (Wolff-Parkinson-White syndrome)

A delta wave is a slurred upstroke at the beginning of the QRS caused by ventricular pre-excitation in WPW syndrome.

Question 41: A prolonged QT interval increases the risk of:

First-degree heart block
Torsades de pointes (Correct answer)
Atrial flutter
Pericarditis

Correct answer: Torsades de pointes

Prolonged QT interval can lead to torsades de pointes, a dangerous polymorphic ventricular tachycardia that can degenerate into ventricular fibrillation.

Question 42: Which ECG finding is characteristic of right ventricular hypertrophy related to cor pulmonale?

Right axis deviation with tall R in V1 (Correct answer)
Tall R waves in V5–V6
Left axis deviation with broad S in V1
Delta waves in V1–V3

Correct answer: Right axis deviation with tall R in V1

RVH produces right axis deviation and a dominant R wave in V1 due to increased right ventricular mass shifting the electrical axis rightward.

Question 43: A patient with chest pain has ST elevation in leads I, aVL, V5, and V6. Which territory is involved?

Inferior
Lateral (Correct answer)
Posterior
Anterior

Correct answer: Lateral

ST elevation in I, aVL, V5, and V6 indicates a lateral wall MI, typically from circumflex artery occlusion.

Question 44: What skin preparation technique best improves Holter electrode adhesion and signal quality?

Applying moisturizing lotion before electrode placement
Lightly abrading the skin with gauze or prep pad and allowing it to dry completely (Correct answer)
Cooling the skin with an ice pack immediately before applying electrodes
Applying petroleum jelly beneath the electrode gel pad

Correct answer: Lightly abrading the skin with gauze or prep pad and allowing it to dry completely

Lightly abrading the skin removes oils, dead skin cells, and surface debris, which reduces impedance and improves electrode-to-skin contact, resulting in better signal quality and less artifact.

Question 45: What is the typical recording duration of a standard Holter monitor?

6 to 12 hours
72 to 96 hours
7 to 14 days
24 to 48 hours (Correct answer)

Correct answer: 24 to 48 hours

Standard Holter monitors record cardiac activity continuously for 24 to 48 hours to capture daily rhythm variations and correlate symptoms with arrhythmias.

Question 46: What artifact can be caused by patient movement during ECG recording?

Bundle branch block pattern
ST elevation
Wandering baseline and muscle tremor artifact (Correct answer)
Peaked T waves

Correct answer: Wandering baseline and muscle tremor artifact

Patient movement causes wandering baseline (slow undulation) and muscle tremor artifact (irregular, fine oscillations), which can obscure the true ECG signal.

Question 47: A CET observes a potentially life-threatening rhythm during routine ECG acquisition. What is the FIRST action?

Administer first aid medications from the crash cart
Immediately notify the supervising physician or nurse (Correct answer)
Interpret and document the finding independently
Repeat the ECG to confirm the tracing

Correct answer: Immediately notify the supervising physician or nurse

CETs must immediately report critical findings to the supervising licensed clinician, as they do not independently diagnose or treat.

Question 48: What ECG pattern is associated with acute pulmonary embolism?

ST elevation in V1–V4
Delta waves in lateral leads
Peaked P waves in lead II
S1Q3T3 pattern (S wave in I, Q wave and T-wave inversion in III) (Correct answer)

Correct answer: S1Q3T3 pattern (S wave in I, Q wave and T-wave inversion in III)

The S1Q3T3 pattern reflects right heart strain from acute PE, though sinus tachycardia is the most common PE ECG finding.

Question 49: A patient presents with syncope. ECG shows a QTc of 520 ms. Which medication is most likely responsible?

Aspirin
Lisinopril
Amiodarone (Correct answer)
Metoprolol

Correct answer: Amiodarone

Amiodarone prolongs the QT interval significantly and is a common iatrogenic cause of QTc prolongation.

Question 50: Delta waves on an ECG are associated with which pre-excitation syndrome?

Brugada syndrome
Long QT syndrome
Lown-Ganong-Levine syndrome
Wolff-Parkinson-White syndrome (Correct answer)

Correct answer: Wolff-Parkinson-White syndrome

Wolff-Parkinson-White syndrome causes delta waves due to early ventricular activation via an accessory pathway (Bundle of Kent).

Question 51: Which of the following best describes the electrophysiological difference between SA nodal cells and ventricular myocytes?

Both cell types have identical action potential morphology
SA nodal cells have a stable resting potential of -90 mV; ventricular cells spontaneously depolarize
SA nodal cells lack a stable resting potential and spontaneously depolarize; ventricular cells have a stable -90 mV resting potential (Correct answer)
Ventricular cells use Ca2+ for Phase 0; SA nodal cells use Na+

Correct answer: SA nodal cells lack a stable resting potential and spontaneously depolarize; ventricular cells have a stable -90 mV resting potential

SA nodal cells have an unstable 'maximum diastolic potential' of about -60 mV and rely on Phase 4 spontaneous depolarization, while ventricular myocytes maintain a stable -90 mV resting potential.

Question 52: How long can a cardiac patch monitor (extended ambulatory monitor) typically record compared to a standard Holter?

Exactly 5 minutes per session
Up to 6 months continuously
Up to 14 days (Correct answer)
24 to 48 hours

Correct answer: Up to 14 days

Extended Holter patch monitors, such as the Zio Patch, can record continuously for up to 14 days, significantly increasing the yield for detecting infrequent or intermittent arrhythmias.

Question 53: In a patient with atrial fibrillation, which ECG feature is characteristically absent?

R waves
T waves
QRS complexes
Distinct P waves (Correct answer)

Correct answer: Distinct P waves

Atrial fibrillation produces chaotic atrial activity with no discernible P waves, replaced by irregular fibrillatory baseline.

Question 54: The moderator band (septomarginal trabecula) is found in which cardiac chamber?

Left ventricle
Left atrium
Right ventricle (Correct answer)
Right atrium

Correct answer: Right ventricle

The moderator band crosses the right ventricular cavity and carries part of the right bundle branch to the anterior papillary muscle.

Question 55: During ECG acquisition, the technician notices the calibration pulse measures 5 mm instead of the standard 10 mm. What does this indicate?

The paper speed is set to 25 mm/s
The gain is set to half standard (5 mm/mV) (Correct answer)
The electrodes have high impedance
The high-pass filter is engaged

Correct answer: The gain is set to half standard (5 mm/mV)

Standard ECG calibration is 10 mm/mV; a 5 mm calibration pulse means the gain is halved (5 mm/mV), which will make all waveforms appear half their true amplitude.

Question 56: Which ECG change is most characteristic of hyperkalemia?

Tall, peaked T waves (Correct answer)
Prolonged QT interval
Delta waves
Sawtooth P waves

Correct answer: Tall, peaked T waves

Early hyperkalemia produces tall, peaked (tented) T waves; as potassium rises further, PR prolongation, wide QRS, and ultimately sine wave pattern develop.

Question 57: A patient's QTc is 520 ms before starting an antiarrhythmic. According to standard safety thresholds, this QTc value should prompt which action?

Withhold the drug; QTc >500 ms is a contraindication to most QT-prolonging antiarrhythmics (Correct answer)
Proceed normally; QTc is only clinically significant above 600 ms
Give prophylactic magnesium and start the drug
Administer a reduced loading dose and recheck in 4 hours

Correct answer: Withhold the drug; QTc >500 ms is a contraindication to most QT-prolonging antiarrhythmics

A baseline QTc >500 ms is generally a contraindication to QT-prolonging antiarrhythmics because the risk of drug-induced torsades de pointes is substantially elevated.

Question 58: The 'vulnerable period' of the cardiac cycle, when an R-on-T phenomenon can trigger ventricular fibrillation, corresponds to which ECG feature?

The QRS complex
The ST segment
The ascending limb of the T wave (relative refractory period) (Correct answer)
The PR segment

Correct answer: The ascending limb of the T wave (relative refractory period)

The ascending limb of the T wave represents the relative refractory period when cells have partially repolarized — a stimulus here can cause heterogeneous conduction and VF.

Question 59: If a candidate fails the ECG certification exam, what is the typical waiting period before they can retake it?

6 months minimum for every attempt
1 full year
No waiting period — retake immediately
30 to 90 days, depending on the certifying body (Correct answer)

Correct answer: 30 to 90 days, depending on the certifying body

Most certification bodies impose a waiting period of 30–90 days between exam attempts to allow candidates time for additional study.

Question 60: What is the term for a Holter recording event created when the patient presses the device button during symptoms?

Patient-activated event marker (Correct answer)
ST deviation marker
Scheduled event
Auto-triggered arrhythmia alert

Correct answer: Patient-activated event marker

When a patient experiences symptoms and presses the event button, a patient-activated event marker is embedded in the recording, allowing direct correlation between symptoms and the ECG at that moment.

Question 61: How many continuing education (CE) hours are typically required to renew an ECG technician certification in the US?

10 hours every 2 years
40 hours every 5 years
30 hours every 3 years
20 hours every 2 years (Correct answer)

Correct answer: 20 hours every 2 years

Most ECG certification programs require 20 CE hours per 2-year renewal cycle to ensure technicians stay current.

Question 62: Which valve is located at the origin of the pulmonary artery and prevents backflow into the right ventricle?

Mitral valve
Aortic valve
Tricuspid valve
Pulmonic valve (Correct answer)

Correct answer: Pulmonic valve

The pulmonic (pulmonary) valve is a semilunar valve that opens during right ventricular systole and closes to prevent regurgitation.

Question 63: Which federal law most directly governs the clinical environment in which ECG technicians work?

EMTALA
HIPAA (Health Insurance Portability and Accountability Act) (Correct answer)
Stark Law
OSHA Bloodborne Pathogens Standard

Correct answer: HIPAA (Health Insurance Portability and Accountability Act)

HIPAA governs patient health information privacy, which ECG technicians must observe when handling patient data and tracings.

Question 64: Which color is the right arm (RA) lead wire in standard US ECG color coding?

Black
Red
Green
White (Correct answer)

Correct answer: White

In the US AHA color coding system, the right arm lead is white.

Question 65: How does a lapse in ECG certification affect a technician's eligibility to recertify?

A lapsed certification is automatically renewed upon request
There is no difference between active and lapsed certification status
A lapsed certification permanently bars the technician from recertifying
A lapsed certification may require the technician to retest or complete additional continuing education before reinstatement (Correct answer)

Correct answer: A lapsed certification may require the technician to retest or complete additional continuing education before reinstatement

After a certification lapses, reinstatement typically requires additional steps beyond normal renewal, which may include retesting depending on how long it has been inactive.

Question 66: Which career pathway BEST represents upward mobility for an experienced ECG technician?

Becoming a hospital administrator
Moving into medical records management
Transitioning to medical transcription
Advancing to cardiovascular technologist or echocardiographer (Correct answer)

Correct answer: Advancing to cardiovascular technologist or echocardiographer

Cardiovascular technologist and echocardiographer roles represent natural, credential-supported advancement paths from ECG technician work.

Question 67: A patient with hypercalcemia would most likely show which ECG change?

Tall peaked T waves
Shortened QT interval (Correct answer)
Prominent U waves
Prolonged QT interval

Correct answer: Shortened QT interval

Hypercalcemia shortens the QT interval because elevated calcium accelerates ventricular repolarization.

Question 68: A patient in torsades de pointes should receive which treatment to stabilize cardiac membranes?

Amiodarone infusion
IV magnesium sulfate (Correct answer)
Digoxin loading dose
Oral flecainide

Correct answer: IV magnesium sulfate

Magnesium sulfate is the treatment of choice for torsades de pointes because it stabilizes cardiac membranes and suppresses early afterdepolarizations.

Question 69: What is the standard paper speed used for ECG recordings in the US?

100 mm/sec
25 mm/sec (Correct answer)
50 mm/sec
10 mm/sec

Correct answer: 25 mm/sec

The standard ECG paper speed in the US is 25 mm/sec.

Question 70: A patient arrives for an ECG with lotion on the chest. The best immediate action is to:

Wipe the skin dry with a towel and apply electrodes
Clean the skin with an alcohol prep pad and allow it to dry (Correct answer)
Proceed with the ECG and note the artifact
Apply extra electrode gel over the lotion

Correct answer: Clean the skin with an alcohol prep pad and allow it to dry

Alcohol prep pads remove oils and lotion that impair electrode adhesion; allowing the skin to dry fully ensures good contact.

Question 71: After the patient returns from a completed Holter recording, what is the FIRST step a technician should take?

Download the recording data and verify completeness before removing the monitor (Correct answer)
Have the patient sign a post-procedure consent form
Print a 30-second rhythm strip and submit it without full analysis
Immediately dispose of the electrodes and clean the device for reuse

Correct answer: Download the recording data and verify completeness before removing the monitor

Downloading and verifying the recording data completeness before removing the Holter device ensures all data was successfully captured and prevents the need for a repeat monitoring session due to data loss.

Question 72: Which common household device is LEAST likely to cause interference with a Holter monitor recording?

TENS unit (transcutaneous electrical nerve stimulation)
Standard table lamp (Correct answer)
Electric blanket
Microwave oven

Correct answer: Standard table lamp

A standard table lamp produces minimal electromagnetic emissions, unlike TENS units, electric blankets, or microwave ovens, which generate sufficient electromagnetic fields to introduce artifact into the Holter recording.

Question 73: Which organization offers the Certified Cardiographic Technician (CCT) credential?

American Heart Association (AHA)
National Healthcareer Association (NHA)
The Joint Commission (TJC)
Cardiovascular Credentialing International (CCI) (Correct answer)

Correct answer: Cardiovascular Credentialing International (CCI)

Cardiovascular Credentialing International (CCI) is a prominent independent credentialing organization for cardiovascular technology professionals. They offer various certifications, including the Certified Cardiographic Technician (CCT) credential, which validates expertise in performing advanced ECGs, stress tests, and other non-invasive cardiac procedures.

Question 74: Telehealth and remote cardiac monitoring are expanding. How should a forward-thinking ECG technician respond to this trend?

Seek training in remote monitoring platforms and wearable cardiac device data interpretation (Correct answer)
Ignore it, as in-person ECG will always be the standard
Request a transfer to a non-technology-dependent department
Wait for the employer to mandate training before engaging

Correct answer: Seek training in remote monitoring platforms and wearable cardiac device data interpretation

Proactively developing remote monitoring skills positions an ECG technician for emerging roles in telehealth and wearable cardiac technology.

Question 75: A patient's ECG alarm is alarming frequently with no clinical change — what is this called?

Threshold desensitization
Artifact interference
False positive monitoring
Alarm fatigue (Correct answer)

Correct answer: Alarm fatigue

Alarm fatigue occurs when frequent non-actionable alarms cause staff to become desensitized, posing a patient safety risk.

Question 76: What should a patient do if a Holter electrode falls off during monitoring?

Remove all remaining electrodes and return to the clinic immediately
Stop the recording and restart the entire monitoring period
Continue monitoring without replacing the electrode
Replace the electrode with a spare and note the time in the activity diary (Correct answer)

Correct answer: Replace the electrode with a spare and note the time in the activity diary

The patient should replace the fallen electrode with a spare if provided and document the time in the diary, allowing the technician to account for any signal interruption or artifact during that period.

Question 77: After applying a Holter monitor, which step should be completed before the patient leaves the office?

Apply a simultaneous 12-lead ECG for comparison
Measure the patient's blood pressure in both arms
Have the patient perform a 10-minute treadmill walk
Review a sample ECG tracing to confirm all leads have adequate signal quality (Correct answer)

Correct answer: Review a sample ECG tracing to confirm all leads have adequate signal quality

Reviewing a sample ECG tracing confirms that all electrodes are recording properly and that signal quality is adequate before the patient departs for their monitoring period.

Question 78: A medical assistant who performs ECGs as part of their job wants to obtain ECG certification. What pathway would most likely apply?

Medical assistants are automatically exempt from all requirements
They must obtain RN licensure before applying
Qualifying through work experience and employer verification of clinical ECG hours (Correct answer)
They must complete a separate full-length ECG diploma program first

Correct answer: Qualifying through work experience and employer verification of clinical ECG hours

Many certifying bodies allow experienced healthcare workers to qualify through documented on-the-job ECG experience verified by their employer.

Question 79: What is the purpose of the QTc (corrected QT) interval calculation in monitoring?

To detect ST changes independent of rate
To adjust QT for heart rate and identify prolongation risk for torsades de pointes (Correct answer)
To calculate left ventricular ejection fraction
To measure P-wave duration accurately

Correct answer: To adjust QT for heart rate and identify prolongation risk for torsades de pointes

QTc corrects the QT interval for heart rate, allowing standardized assessment of prolongation risk for fatal arrhythmias.

Question 80: What is the voltage gain setting used in half-standardization on an ECG?

20 mm/mV
10 mm/mV
5 mm/mV (Correct answer)
2.5 mm/mV

Correct answer: 5 mm/mV

Half-standardization sets gain to 5 mm/mV, used when waveforms are too tall at normal gain.

Question 81: What is the primary purpose of a patient activity diary during Holter monitoring?

To track only medication dosing times
To record hourly blood pressure readings
To correlate reported symptoms with corresponding ECG rhythm changes (Correct answer)
To document total sleep duration

Correct answer: To correlate reported symptoms with corresponding ECG rhythm changes

The patient diary allows technicians and physicians to correlate the timing of reported symptoms such as palpitations or dizziness with the ECG tracing at that exact time.

Question 82: A junctional rhythm with a rate of 60–100 bpm is best described as:

Junctional tachycardia
Normal sinus rhythm
Junctional escape rhythm
Accelerated junctional rhythm (Correct answer)

Correct answer: Accelerated junctional rhythm

When the AV junction fires at 60–100 bpm (faster than its intrinsic 40–60 bpm but not tachycardia), it is called an accelerated junctional rhythm.

Question 83: Which patient activity should be specifically avoided during standard Holter monitoring?

Sleeping on their side
Consuming caffeine
Showering or immersing in water (Correct answer)
Walking or mild exercise

Correct answer: Showering or immersing in water

Most standard Holter monitors are not waterproof and can be damaged or lose electrode contact if exposed to water during bathing or showering.

Question 84: What is the recommended ECG lead for detecting ST-segment changes in the anterior wall of the left ventricle?

V1
V4 or V5 (Correct answer)
Lead II
aVL

Correct answer: V4 or V5

V4 and V5 provide the best sensitivity for detecting anterior wall ST changes during ischemia monitoring.

Question 85: Which of the following candidates would typically NOT meet the standard eligibility requirements for an ECG certification exam?

A registered nurse seeking additional credentialing
A high school dropout with 5 years of ECG experience (Correct answer)
A medical assistant with formal ECG training
A graduate of an accredited cardiac technology program

Correct answer: A high school dropout with 5 years of ECG experience

Most ECG certification exams require at minimum a high school diploma or GED, so candidates without this credential may be ineligible regardless of experience.

Question 86: What is the standard number of leads in a 12-lead ECG?

6 leads from 6 electrodes
12 leads from 12 electrodes
10 leads from 10 electrodes
12 leads from 10 electrodes (Correct answer)

Correct answer: 12 leads from 10 electrodes

A 12-lead ECG uses 10 physical electrodes (4 limb, 6 precordial) to generate 12 different electrical views of the heart.

Question 87: Which valve separates the left atrium from the left ventricle?

Mitral valve (Correct answer)
Tricuspid valve
Aortic valve
Pulmonary valve

Correct answer: Mitral valve

The mitral (bicuspid) valve has two leaflets and prevents backflow from the left ventricle into the left atrium during systole.

Question 88: On a standard 12-lead ECG recorded at 25 mm/s, each small box (1 mm) represents how much time?

0.02 seconds (20 ms) (Correct answer)
0.20 seconds (200 ms)
0.04 seconds (40 ms)
0.10 seconds (100 ms)

Correct answer: 0.02 seconds (20 ms)

At standard speed of 25 mm/s, each 1 mm small box = 0.04 s/box ÷ 2 = 0.04 s per small box; actually each small box = 1mm / 25mm/s = 0.04 s.

Question 89: What does the QRS complex represent?

Atrial depolarization
Ventricular repolarization
Ventricular depolarization (Correct answer)
AV node conduction

Correct answer: Ventricular depolarization

The QRS complex represents the rapid depolarization of both ventricles, triggering ventricular contraction and ejection of blood.

Question 90: Which lead is best for identifying atrial activity?

Lead I
Lead V1 (Correct answer)
Lead V6
Lead aVL

Correct answer: Lead V1

Lead V1, positioned over the right sternal border, is closest to the atria and provides the best visualization of P waves and atrial activity.

Question 91: Atropine is administered to a patient in symptomatic bradycardia. What is its mechanism of action on the heart?

Inhibits sodium channels, stabilizing membranes
Blocks alpha receptors, reducing afterload
Blocks muscarinic receptors, increasing heart rate (Correct answer)
Stimulates beta-1 receptors, increasing contractility

Correct answer: Blocks muscarinic receptors, increasing heart rate

Atropine competitively blocks muscarinic (M2) receptors, removing vagal tone and allowing the SA node to increase its firing rate.

Question 92: An ECG shows no P waves, a ventricular rate of 35 bpm, and wide QRS complexes. What rhythm is this?

Junctional escape rhythm
Sinus bradycardia
Accelerated idioventricular rhythm
Third-degree (complete) AV block with ventricular escape (Correct answer)

Correct answer: Third-degree (complete) AV block with ventricular escape

Complete AV block with ventricular escape produces slow wide-complex rhythm independent of P waves (which may be present but dissociated).

Question 93: A patient receives IV adenosine for SVT. Which ECG change would you expect immediately after administration?

Transient AV block (Correct answer)
Prolonged QT interval
ST elevation
Wide QRS complex

Correct answer: Transient AV block

Adenosine causes transient AV block by hyperpolarizing AV nodal cells, which terminates reentrant SVT.

Question 94: What is the primary role of a Certified Electrocardiograph Technician (CET)?

Performing and recording ECGs for physician interpretation (Correct answer)
Diagnosing cardiac arrhythmias from ECG tracings
Prescribing antiarrhythmic medications
Implanting cardiac monitoring devices

Correct answer: Performing and recording ECGs for physician interpretation

CETs perform and record ECG tracings that are then interpreted by licensed physicians.

Question 95: What does 'signal-averaged ECG' (SAECG) primarily detect?

ST-segment elevation patterns
P-wave morphology changes
QT interval prolongation
Late potentials indicating risk for ventricular arrhythmias (Correct answer)

Correct answer: Late potentials indicating risk for ventricular arrhythmias

SAECG detects ventricular late potentials, which indicate areas of slow conduction predisposing to re-entrant ventricular arrhythmias.

Question 96: A 60-year-old man has an ECG showing Mobitz Type II block. What is the most appropriate initial management?

Adenosine IV
Transcutaneous pacing (Correct answer)
Observation only
Atropine IV

Correct answer: Transcutaneous pacing

Mobitz Type II is unpredictable and can progress to complete heart block; transcutaneous pacing is required as a bridge to permanent pacing.

Question 97: An ECG shows ST elevation in leads II, III, and aVF. Which coronary artery is most likely occluded?

Left circumflex
Right coronary artery (Correct answer)
Left anterior descending
Left main coronary artery

Correct answer: Right coronary artery

ST elevation in inferior leads (II, III, aVF) indicates inferior MI, most commonly due to RCA occlusion.

Question 98: Which ECG change is most characteristic of hyperkalemia?

ST depression in V4-V6
Prolonged QT interval
Prominent U waves
Tall peaked T waves (Correct answer)

Correct answer: Tall peaked T waves

Hyperkalemia causes tall, narrow, peaked (tent-shaped) T waves as an early finding due to altered ventricular repolarization.

Question 99: Which ECG finding is associated with right ventricular infarction?

ST elevation in V1-V4
ST elevation in right-sided leads (V3R-V4R) (Correct answer)
ST depression in V5-V6
Q waves in leads I and aVL

Correct answer: ST elevation in right-sided leads (V3R-V4R)

Right ventricular MI is diagnosed by ST elevation in right-sided leads (V3R-V4R), which are not part of standard 12-lead ECGs.

Question 100: Which ECG finding is characteristic of hyperacute (early) myocardial ischemia at the cellular level?

ST depression from pericarditis
Prolonged PR interval from AV node ischemia
Pathological Q waves from necrosis
Peaked T waves from altered K+ gradient across the ischemic zone (Correct answer)

Correct answer: Peaked T waves from altered K+ gradient across the ischemic zone

Early ischemia causes intracellular K+ to leak out, raising extracellular K+ in the ischemic zone and producing hyperacute (tall, peaked) T waves.

Question 101: Where is the V1 precordial lead electrode placed?

5th intercostal space, left midclavicular line
4th intercostal space, right sternal border (Correct answer)
4th intercostal space, left sternal border
2nd intercostal space, right sternal border

Correct answer: 4th intercostal space, right sternal border

V1 is placed at the 4th intercostal space along the right sternal border.

Question 102: What is the most common clinical indication for ordering a Holter monitor?

Evaluation of unexplained syncope, palpitations, or suspected arrhythmia (Correct answer)
Assessment of valvular heart disease severity
Routine annual cardiac screening for all adults over 40
Monitoring blood pressure variability over 24 hours

Correct answer: Evaluation of unexplained syncope, palpitations, or suspected arrhythmia

Holter monitoring is most commonly ordered to evaluate intermittent symptoms such as palpitations, dizziness, or syncope that may correlate with cardiac arrhythmias not captured on a standard 12-lead ECG.

Question 103: On telemetry, a patient's rhythm suddenly shows fine, chaotic baseline deflections with no identifiable P waves, QRS complexes, or T waves. What is this rhythm?

Artifact
Asystole
Ventricular fibrillation (Correct answer)
Atrial fibrillation

Correct answer: Ventricular fibrillation

Ventricular fibrillation (VF) produces disorganized chaotic waveforms with no discernible cardiac complexes and requires immediate defibrillation.

Question 104: How often must most ECG technicians renew their certification to maintain active status?

Every 10 years
Every year
Every 2 years (Correct answer)
Every 5 years

Correct answer: Every 2 years

Most ECG and cardiovascular technology certifications require renewal every two years, including continuing education credits.

Question 105: What is the most common cause of pseudo-Q waves (QS pattern) in leads V1-V2 in an otherwise healthy patient?

Incorrect precordial electrode placement (too high) (Correct answer)
Old anteroseptal myocardial infarction
Right ventricular hypertrophy
Left posterior fascicular block

Correct answer: Incorrect precordial electrode placement (too high)

Placing V1 and V2 electrodes one or two intercostal spaces too high is the most common technical cause of QS patterns mimicking anteroseptal infarction.

Question 106: What is the significance of lead reversal on a 12-lead ECG?

It automatically triggers an alarm
It only affects the heart rate display
It can mimic pathological conditions and lead to misdiagnosis (Correct answer)
It has no clinical significance

Correct answer: It can mimic pathological conditions and lead to misdiagnosis

Lead reversal can produce ECG patterns that mimic pathology such as dextrocardia, lateral MI, or right axis deviation, potentially leading to unnecessary interventions.

Question 107: A patient with acute anterior MI develops a new right bundle branch block. Which ECG lead best demonstrates the RBBB pattern?

Lead I
Lead II
Lead aVF
Lead V1 (Correct answer)

Correct answer: Lead V1

RBBB produces an RSR' (rabbit ears) pattern best seen in V1 with a wide S wave in lead I.

Question 108: A narrow-complex tachycardia terminates abruptly with administration of adenosine and then resumes. This strongly suggests:

AV node-dependent reentrant tachycardia (AVNRT or AVRT) (Correct answer)
Atrial flutter
Multifocal atrial tachycardia
Ventricular tachycardia

Correct answer: AV node-dependent reentrant tachycardia (AVNRT or AVRT)

Adenosine transiently blocks the AV node; termination and resumption indicates the tachycardia circuit depends on AV nodal conduction (AVNRT or AVRT).

Question 109: A patient's Holter recording shows frequent motion artifact during a specific 30-minute period. What is the BEST first step in analysis?

Ask the physician to reinterpret the entire 24-hour recording
Correlate the time period with the patient's activity diary to identify the cause (Correct answer)
Report the artifact as ventricular tachycardia to the physician
Discard that section of the recording entirely

Correct answer: Correlate the time period with the patient's activity diary to identify the cause

Correlating artifact timing with the patient's activity diary allows the technician to identify the likely cause (e.g., exercise, using an electric shaver) and distinguish motion artifact from true arrhythmia.

Question 110: A 60-year-old male presents with chest pain. The ECG shows ST depression in leads V1-V3. Which condition should be ruled out first?

Right bundle branch block
Digitalis effect
Anterior STEMI
Posterior MI (reciprocal changes) (Correct answer)

Correct answer: Posterior MI (reciprocal changes)

ST depression in V1-V3 may represent reciprocal changes of a posterior MI; posterior leads (V7-V9) should be obtained to look for ST elevation confirming posterior STEMI.

Question 111: Which AHA monitoring category applies to patients who are in the first 48 hours after acute MI?

Class IV (monitoring contraindicated)
Class II (monitoring of uncertain benefit)
Class I (monitoring indicated) (Correct answer)
Class III (monitoring not indicated)

Correct answer: Class I (monitoring indicated)

The AHA designates continuous cardiac monitoring as Class I (clearly indicated) during the first 48 hours after acute MI.

Question 112: Early afterdepolarizations (EADs) typically occur during which phase of the action potential?

Phase 1 (early repolarization notch)
Phase 4 (diastole)
Phase 2 or Phase 3 (plateau/early repolarization) (Correct answer)
Phase 0 (rapid depolarization)

Correct answer: Phase 2 or Phase 3 (plateau/early repolarization)

EADs arise during Phase 2 or 3 when the action potential is prolonged, allowing reactivation of L-type Ca2+ channels before complete repolarization.

Question 113: What is first-degree AV block characterized by?

Irregular ventricular rhythm
Complete dissociation of P waves and QRS
PR interval greater than 0.20 seconds with all P waves conducted (Correct answer)
Dropped QRS complexes

Correct answer: PR interval greater than 0.20 seconds with all P waves conducted

First-degree AV block shows a prolonged PR interval (>0.20 sec) but every P wave is followed by a QRS complex — conduction is delayed but not blocked.

Question 114: What ECG finding in a monitored patient should prompt the nurse to call a rapid response immediately?

First-degree AV block
Sustained ventricular tachycardia with a heart rate of 180 bpm (Correct answer)
Sinus bradycardia at 58 bpm with no symptoms
PACs with a compensatory pause

Correct answer: Sustained ventricular tachycardia with a heart rate of 180 bpm

Sustained ventricular tachycardia is a life-threatening arrhythmia requiring immediate clinical assessment and intervention.

Question 115: A technician records an ECG and notices the QRS in lead I is negative and in aVR is positive. What is the most likely cause?

Left bundle branch block
Dextrocardia
Right arm and left arm lead reversal (Correct answer)
Left axis deviation

Correct answer: Right arm and left arm lead reversal

Reversal of the right and left arm electrodes produces a negative QRS in lead I and a positive QRS in aVR, the mirror image of normal.

Question 116: What is the approximate conduction velocity through the AV node?

4 m/s
2.5 m/s
0.05 m/s (Correct answer)
1 m/s

Correct answer: 0.05 m/s

The AV node conducts very slowly at approximately 0.05 m/s, creating the necessary delay between atrial and ventricular contraction.

Question 117: What does the credential 'RCS' (Registered Cardiac Sonographer) indicate about its holder?

Certification in cardiac catheterization laboratory procedures
Basic ECG competency
Eligibility to independently read and report cardiac studies
Advanced competency in echocardiography and cardiac ultrasound (Correct answer)

Correct answer: Advanced competency in echocardiography and cardiac ultrasound

The RCS credential, awarded by CCI, certifies advanced proficiency in cardiac ultrasound and echocardiography.

Question 118: A patient with known COPD shows peaked P waves exceeding 2.5 mm in lead II. This finding is called:

Epsilon wave
Delta wave
P mitrale
P pulmonale (Correct answer)

Correct answer: P pulmonale

Tall, peaked P waves in lead II (>2.5 mm) indicate right atrial enlargement, termed P pulmonale, commonly seen in chronic lung disease.

Question 119: A Holter monitor is most appropriate for evaluating a patient who experiences palpitations:

Intermittently throughout daily activities over 24–48 hours (Correct answer)
Continuously in the clinic during a resting 12-lead ECG
Only during heavy physical exertion on a treadmill
Exclusively during sleep

Correct answer: Intermittently throughout daily activities over 24–48 hours

A Holter monitor records continuous ECG over 24–48 hours, capturing arrhythmias that occur unpredictably during normal daily activities.

Question 120: Which drug would be most appropriate to administer for a stable narrow-complex SVT that does not respond to vagal maneuvers?

Metoprolol 5 mg IV slow push
Adenosine 6 mg rapid IV push (Correct answer)
Lidocaine 1 mg/kg IV
Amiodarone 150 mg over 10 minutes

Correct answer: Adenosine 6 mg rapid IV push

Adenosine 6 mg rapid IV push is the first-line drug per ACLS for stable SVT that fails vagal maneuvers due to its fast onset and extremely short duration of action.

NHA Certified EKG Technician (CET)

The NHA CET certification validates competency in performing and interpreting electrocardiograms, including proper patient preparation, ECG acquisition, safety compliance, and basic rhythm analysis for healthcare professionals.

120

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120 min

Time Limit

70%

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