Interpretation of ECG Rhythms Quiz

Test your knowledge on ECG rhythms with questions covering depolarization, intervals, waves, and heart wall views.

#1

Which component of the ECG represents ventricular depolarization?

P wave
QRS complex
T wave
U wave
#2

What does the term 'QT interval' represent in an ECG?

Atrial depolarization time
Ventricular repolarization time
Atrial repolarization time
Ventricular depolarization time
#3

What does the term 'sinus rhythm' refer to in an ECG?

Normal heart rhythm
Atrial fibrillation
Ventricular tachycardia
Heart block
#4

Which part of the ECG represents atrial repolarization?

P wave
QRS complex
T wave
U wave
#5

What does the term 'premature ventricular contraction (PVC)' indicate in an ECG?

Normal sinus rhythm
Early heartbeat originating in the ventricles
Atrial fibrillation
Heart block
#6

What does a prolonged PR interval on an ECG indicate?

Atrial fibrillation
Heart block
Ventricular tachycardia
Normal sinus rhythm
#7

In ECG nomenclature, what does the term 'ST segment' stand for?

Sinoatrial segment
Segment time
Systolic time
S-Tachy segment
#8

In ECG, what is the primary purpose of the 'T wave'?

Atrial depolarization
Ventricular depolarization
Atrial repolarization
Ventricular repolarization
#9

Which condition is associated with a 'flat' or 'inverted' T wave in an ECG?

Myocardial infarction
Hyperkalemia
Hypokalemia
Atrial fibrillation
#10

Which ECG lead provides information about the lateral wall of the heart?

Lead I
Lead II
Lead III
Lead aVL
#11

What does the presence of 'sawtooth' pattern in an ECG suggest?

Atrial fibrillation
Ventricular tachycardia
Normal sinus rhythm
Supraventricular tachycardia
#12

Which lead in the standard 12-lead ECG provides information about the inferior wall of the heart?

Lead I
Lead II
Lead III
Lead aVR
#13

What is the standard paper speed used in most ECG recordings?

25 mm/s
50 mm/s
75 mm/s
100 mm/s
#14

In lead aVL of the standard 12-lead ECG, which area of the heart is predominantly viewed?

Inferior wall
Anterior wall
Lateral wall
Posterior wall
#15

Which condition is characterized by a rapid, irregular atrial rhythm on an ECG?

Atrial fibrillation
Atrial flutter
Supraventricular tachycardia
Ventricular fibrillation

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