Understanding ECG Interpretation and Cardiac Conduction Quiz

Test your knowledge on ECG waves, intervals, and leads. Explore atrial depolarization, QRS complex, QT interval, and more in this quiz!

#1

Which wave represents atrial depolarization in an ECG?

P wave
QRS complex
T wave
U wave
#2

What does the QRS complex represent in an ECG?

Atrial depolarization
Ventricular depolarization
Atrial repolarization
Ventricular repolarization
#3

Which interval on an ECG corresponds to ventricular depolarization?

PR interval
QRS complex
QT interval
ST segment
#4

What is the normal duration of the PR interval in milliseconds?

0.06 - 0.10 s
0.10 - 0.20 s
0.20 - 0.40 s
0.40 - 0.60 s
#5

What is the normal heart rate range for an adult at rest?

60 - 100 bpm
40 - 60 bpm
80 - 120 bpm
100 - 140 bpm
#6

Which segment of the ECG represents the time between ventricular depolarization and repolarization?

PR interval
ST segment
QT interval
TP interval
#7

What does a prolonged QT interval indicate?

Atrial fibrillation
Ventricular tachycardia
Ventricular fibrillation
Increased risk of arrhythmias
#8

What does an inverted T wave in an ECG indicate?

Myocardial infarction
Atrial fibrillation
Hyperkalemia
Normal variant
#9

Which ECG lead is commonly used to diagnose right ventricular hypertrophy?

Lead I
Lead II
Lead V1
Lead V6
#10

Which lead placement is useful for detecting inferior myocardial infarction?

Lead I
Lead II
Lead III
Lead aVF
#11

Which lead placement provides the best view of the lateral wall of the left ventricle in an ECG?

Lead I
Lead II
Lead III
Lead aVL
#12

What does an absence of P waves on an ECG suggest?

Atrial fibrillation
Atrial flutter
Ventricular tachycardia
Ventricular fibrillation
#13

Which condition is associated with a prolonged PR interval on an ECG?

Wolff-Parkinson-White syndrome
Bundle branch block
First-degree heart block
Second-degree heart block
#14

What does the J-point represent on an ECG?

Start of the QRS complex
End of the QRS complex
End of the ST segment
Start of the T wave
#15

Which lead provides the best view of the septal wall of the left ventricle in an ECG?

Lead I
Lead II
Lead V1
Lead V6

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