EKG Interpretation Questions Flashcards – Exam
Questions & Answers, Updated 2026/2027 | Rated A+.
Answer: B. SA node
Which of the following is the dominant
pacemaker of the heart?
A. AV node
B. SA node
C. Purkinje fibers
D. Bundle of His
Answer: A. 60-100 bpm
What is the intrinsic rate of the SA node?
A. 60-100 bpm
B. 40-60 bpm
C. 20-45 bpm
D. 100-120 bpm
Answer: B. Atrial depolarization
The P wave on an EKG represents:
A. Ventricular depolarization
B. Atrial depolarization
C. Atrial repolarization
D. Ventricular repolarization
Answer: B. 0.12-0.20 seconds
What is a normal PR interval duration?
A. 0.04-0.10 seconds
B. 0.12-0.20 seconds
C. 0.20-0.30 seconds
D. 0.08-0.16 seconds
Answer: C. Sinus tachycardia
Which rhythm has a rate greater than 100
bpm with a normal P wave and regular
intervals?
A. Sinus bradycardia
B. Atrial flutter
C. Sinus tachycardia
D. Ventricular fibrillation
Answer: B. One small box
Which part of the EKG paper represents
0.04 seconds?
A. One large box
B. One small box
C. Three small boxes
D. Five large boxes
, EKG Interpretation Questions Flashcards – Exam
Questions & Answers, Updated 2026/2027 | Rated A+.
Answer: C. QRS complex
What represents ventricular depolarization
on the EKG?
A. T wave
B. P wave
C. QRS complex
D. PR interval
Answer: A. Atrial flutter
What rhythm is characterized by a sawtooth
pattern of flutter waves?
A. Atrial flutter
B. Atrial fibrillation
C. Ventricular fibrillation
D. Sinus bradycardia
Answer: B. Atrial fibrillation
Which rhythm has no organized atrial
depolarization and chaotic atrial activity?
A. Ventricular tachycardia
B. Atrial fibrillation
C. Atrial flutter
D. Sinus tachycardia
Answer: B. Irregularly irregular
In atrial fibrillation, the rhythm is:
A. Regular
B. Irregularly irregular
C. Regularly irregular
D. Irregularly regular
Answer: B. Sinus node
What is the primary pacemaker of the heart?
A. Atrial cells
B. Sinus node
C. Ventricular cells
D. AV junction
Answer: B. A re-entrant pathway in the ventricle
Ventricular tachycardia is caused by:
A. Continuous firing of atrial cells
B. A re-entrant pathway in the ventricle
C. Recurrent SA node depolarization
D. High AV node conduction
Answer: C. Ventricular fibrillation
Which rhythm shows a rapid, chaotic, and
uncoordinated firing in the ventricles?
A. Ventricular tachycardia
B. Atrial fibrillation
C. Ventricular fibrillation
D. Sinus bradycardia
Questions & Answers, Updated 2026/2027 | Rated A+.
Answer: B. SA node
Which of the following is the dominant
pacemaker of the heart?
A. AV node
B. SA node
C. Purkinje fibers
D. Bundle of His
Answer: A. 60-100 bpm
What is the intrinsic rate of the SA node?
A. 60-100 bpm
B. 40-60 bpm
C. 20-45 bpm
D. 100-120 bpm
Answer: B. Atrial depolarization
The P wave on an EKG represents:
A. Ventricular depolarization
B. Atrial depolarization
C. Atrial repolarization
D. Ventricular repolarization
Answer: B. 0.12-0.20 seconds
What is a normal PR interval duration?
A. 0.04-0.10 seconds
B. 0.12-0.20 seconds
C. 0.20-0.30 seconds
D. 0.08-0.16 seconds
Answer: C. Sinus tachycardia
Which rhythm has a rate greater than 100
bpm with a normal P wave and regular
intervals?
A. Sinus bradycardia
B. Atrial flutter
C. Sinus tachycardia
D. Ventricular fibrillation
Answer: B. One small box
Which part of the EKG paper represents
0.04 seconds?
A. One large box
B. One small box
C. Three small boxes
D. Five large boxes
, EKG Interpretation Questions Flashcards – Exam
Questions & Answers, Updated 2026/2027 | Rated A+.
Answer: C. QRS complex
What represents ventricular depolarization
on the EKG?
A. T wave
B. P wave
C. QRS complex
D. PR interval
Answer: A. Atrial flutter
What rhythm is characterized by a sawtooth
pattern of flutter waves?
A. Atrial flutter
B. Atrial fibrillation
C. Ventricular fibrillation
D. Sinus bradycardia
Answer: B. Atrial fibrillation
Which rhythm has no organized atrial
depolarization and chaotic atrial activity?
A. Ventricular tachycardia
B. Atrial fibrillation
C. Atrial flutter
D. Sinus tachycardia
Answer: B. Irregularly irregular
In atrial fibrillation, the rhythm is:
A. Regular
B. Irregularly irregular
C. Regularly irregular
D. Irregularly regular
Answer: B. Sinus node
What is the primary pacemaker of the heart?
A. Atrial cells
B. Sinus node
C. Ventricular cells
D. AV junction
Answer: B. A re-entrant pathway in the ventricle
Ventricular tachycardia is caused by:
A. Continuous firing of atrial cells
B. A re-entrant pathway in the ventricle
C. Recurrent SA node depolarization
D. High AV node conduction
Answer: C. Ventricular fibrillation
Which rhythm shows a rapid, chaotic, and
uncoordinated firing in the ventricles?
A. Ventricular tachycardia
B. Atrial fibrillation
C. Ventricular fibrillation
D. Sinus bradycardia
