Practice Test GeeksECG (Electrocardiogram) Practice Test
← All ECG Flashcard Decks

Basic Electrocardiogram Flashcards

7 cards from real ECG practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Basic Electrocardiogram flashcards as text

  1. What does the P wave on an ECG tracing represent?

    Answer: Atrial depolarization

    The P wave reflects the electrical impulse spreading through the atria, causing atrial depolarization.

  2. The QRS complex primarily represents which cardiac event?

    Answer: Ventricular depolarization

    The QRS complex records the rapid depolarization of the right and left ventricles.

  3. What structure is normally the heart's primary pacemaker?

    Answer: Sinoatrial (SA) node

    The SA node in the right atrium initiates the normal heartbeat and sets the heart rate.

  4. The T wave on a standard ECG represents:

    Answer: Ventricular repolarization

    The T wave reflects the recovery, or repolarization, of the ventricles.

  5. How many electrodes are placed on the chest in a standard 12-lead ECG?

    Answer: Six

    Six precordial (chest) electrodes are placed, V1 through V6, along with four limb electrodes.

  6. The PR interval on an ECG mainly reflects:

    Answer: Conduction delay through the AV node

    The PR interval represents the time for the impulse to travel from the atria through the AV node to the ventricles.

  7. A normal adult resting heart rate typically falls within which range?

    Answer: 60 to 100 beats per minute

    A normal resting sinus rhythm in adults is generally 60 to 100 beats per minute.

How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

  1. nhanow.com — Passing score, test delivery, eligibility, renewal, score release, time limit · verified Oct 2026
  2. cci-online.org — Test delivery, fees, exam format, passing score, renewal, score release · verified Oct 2026