TheoryEKG Technician Practice Test Video
Watch the EKG Technician practice test video walkthrough, review the questions, download the free PDF and start an online mock exam.
EKG Technician exam — full Q&A walkthrough
Every question read aloud with the answer explained. Play it on your commute, then test yourself.
Try EKG Technician questions now
Q1Which structure is normally the primary pacemaker of the heart?
Show answer
✓ Correct answer: The sinoatrial (SA) node
The SA node in the right atrium has the fastest intrinsic rate (about 60-100 beats per minute) and therefore sets the normal heart rhythm, called sinus rhythm.
Q2Which chambers of the heart receive blood returning to the heart?
Show answer
✓ Correct answer: The atria
The atria are the upper receiving chambers; the right atrium receives deoxygenated blood from the body and the left atrium receives oxygenated blood from the lungs.
Q3The brief delay of the electrical impulse at the AV node primarily allows time for what to occur?
Show answer
✓ Correct answer: Ventricular filling as the atria contract
The AV node delays conduction so the atria finish contracting and fill the ventricles before ventricular contraction, optimizing stroke volume.
Q4Which valve separates the left atrium from the left ventricle?
Show answer
✓ Correct answer: The mitral (bicuspid) valve
The mitral valve, with two leaflets, lies between the left atrium and left ventricle and prevents backflow during ventricular contraction.
Q5Which side of the heart pumps blood to the lungs?
Show answer
✓ Correct answer: The right side
The right ventricle pumps deoxygenated blood through the pulmonic valve into the pulmonary arteries to the lungs for gas exchange.
Q6Depolarization of a cardiac cell is mainly caused by the rapid influx of which ion?
Show answer
✓ Correct answer: Sodium
The rapid upstroke of the cardiac action potential in working myocardium results from a fast inward sodium current through voltage-gated sodium channels.
Full EKG Technician bank + unlimited mocks
Try 30 questions free. Unlock the complete EKG Technician question bank, every explanation, and unlimited timed mock exams. Practice on any device.
Unlock EKG Technician →