basic-ecg-quiz

Basic ECG Quiz

by ohaagPublished: August 23, 2025

Electrocardiography (ECG) is a vital tool in diagnosing and monitoring heart conditions. This quiz will challenge your understanding of the basic principles and interpretations of ECG readings. Whether you’re a seasoned professional or just starting out, this quiz is designed to refresh and enhance your knowledge. Good luck, and may your knowledge of ECGs be as steady as a healthy heartbeat!
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Basic ECG Quiz
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1. What does the P wave on an ECG represent?
Hint: Think about the electrical activity in the heart.

Basic ECG Quiz Questions Overview

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

Atrial depolarization
Ventricular depolarization
Atrial repolarization
Ventricular repolarization

2. Which part of the ECG represents ventricular depolarization?

P wave
QRS complex
T wave
U wave

3. What does the T wave on an ECG indicate?

Atrial depolarization
Ventricular depolarization
Atrial repolarization
Ventricular repolarization

4. Which interval on the ECG represents the time between the onset of atrial depolarization and the onset of ventricular depolarization?

PR interval
QT interval
ST segment
RR interval

5. What is the normal range for the PR interval?

60-100 ms
120-200 ms
200-300 ms
300-400 ms

6. Which segment on the ECG is used to assess the presence of myocardial ischemia or infarction?

PR segment
ST segment
QT segment
RR segment

7. What does a prolonged QT interval indicate?

Atrial fibrillation
Ventricular tachycardia
Increased risk of torsades de pointes
Decreased heart rate

8. Which lead is considered the ‘rhythm strip’ in a standard 12-lead ECG?

Lead I
Lead II
Lead III
Lead V1

9. What is the normal heart rate range for a healthy adult as seen on an ECG?

40-60 bpm
60-100 bpm
100-120 bpm
120-140 bpm

10. Which of the following is a common cause of an elevated ST segment?

Hypokalemia
Hypercalcemia
Myocardial infarction
Atrial fibrillation
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