KAISER EKG TEST EXAM 400 QUESTIONS AND CORRECT
ANSWERS WITH RATIONALE LATEST UPDATE 2026-2027
ALREADY GRADED A+
This comprehensive question bank contains 400 multiple-choice questions
covering the Kaiser EKG Test Exam 2026 curriculum. It systematically
addresses cardiac conduction anatomy, electrophysiology, EKG waveform
interpretation, arrhythmia recognition, heart blocks, axis determination,
electrolyte disturbances, and pharmacological effects on the EKG. Key topics
include sinus rhythms, atrial and ventricular arrhythmias, bundle branch
blocks, ischemic changes, myocardial infarction patterns, pacemaker
evaluation, and ACLS treatment algorithms. Each question includes the
correct answer and detailed rationale explaining the underlying principles.
The progression from foundational concepts to advanced clinical scenarios
supports effective exam preparation for healthcare professionals pursuing
Kaiser EKG certification.
1. What is the correct sequence of the cardiac conduction system?
A) AV node → SA node → Bundle of His → Purkinje fibers
B) SA node → AV node → Bundle of His → Purkinje fibers
C) SA node → Bundle of His → AV node → Purkinje fibers
D) Purkinje fibers → Bundle of His → AV node → SA node
Answer: B
Rationale: The cardiac conduction pathway begins at the SA node (primary
pacemaker), travels to the AV node, then to the Bundle of His, and finally through
the Purkinje fibers to stimulate ventricular contraction .
2. What are the intrinsic rates of the heart's pacemakers?
A) SA Node: 40-60, AV Node: 20-40, Purkinje: 60-100
B) SA Node: 60-100, AV Node: 40-60, Purkinje: 20-40
C) SA Node: 20-40, AV Node: 60-100, Purkinje: 40-60
D) SA Node: 40-60, AV Node: 60-100, Purkinje: 20-40
Answer: B
,Rationale: The SA node (primary pacemaker) generates 60-100 beats per minute.
The AV node serves as backup at 40-60 bpm, and Purkinje fibers are the tertiary
pacemaker at 20-40 bpm.
3. Define depolarization.
A) Return of cell membrane to resting state
B) Electrical excitation of cell membrane followed by mechanical contraction
C) The period where cardiac cells cannot respond to stimulus
D) The period where cardiac cells respond to strong stimulus
Answer: B
Rationale: Depolarization is the electrical excitation of the cell membrane where
the inside becomes positive and outside negative, normally followed by
mechanical contraction .
4. Define repolarization.
A) Electrical excitation of cell membrane followed by mechanical contraction
B) The period where cardiac cells cannot respond to stimulus
C) Return of cell membrane to resting state (inside negative)
D) The period where cardiac cells respond to strong stimulus
Answer: C
Rationale: Repolarization is the return of the cell membrane to its resting state
where the inside becomes negative again, normally followed by mechanical
relaxation .
5. What is the absolute refractory period?
A) The period from the beginning of QRS to the peak of the T wave where cardiac
cells cannot respond to stimulus
B) The period where cardiac cells have repolarized enough to respond to strong
stimulus
C) The period between P wave and QRS complex
D) The period between T wave and next P wave
Answer: A
Rationale: The absolute refractory period is the time from the beginning of the
QRS complex to the peak of the T wave during which cardiac cells cannot respond
to any stimulus, regardless of strength.
6. What occurs during the relative refractory period?
A) Cardiac cells cannot respond to any stimulus
B) Cardiac cells have repolarized enough to respond to strong stimulus
C) Cardiac cells are completely depolarized
,D) Cardiac cells are in their resting state
Answer: B
Rationale: During the relative refractory period, cardiac cells have repolarized
enough to respond to a strong stimulus. This vulnerable period can lead to
arrhythmias if a strong stimulus occurs.
7. What does the P wave represent on an EKG?
A) Ventricular depolarization
B) Ventricular repolarization
C) Atrial depolarization
D) Atrial repolarization
Answer: C
Rationale: The P wave represents atrial depolarization, which is the electrical
activation of the atria preceding atrial contraction .
8. What does the QRS complex represent?
A) Atrial depolarization
B) Ventricular depolarization
C) Ventricular repolarization
D) Atrial repolarization
Answer: B
Rationale: The QRS complex represents ventricular depolarization, which is the
electrical activation of the ventricles preceding ventricular contraction .
9. What does the T wave represent?
A) Atrial depolarization
B) Ventricular depolarization
C) Ventricular repolarization
D) Atrial repolarization
Answer: C
Rationale: The T wave represents ventricular repolarization, which is the recovery
of the ventricles to their resting electrical state .
10. What is the normal PR interval duration?
A) 0.06-0.10 seconds
B) 0.12-0.20 seconds
C) 0.20-0.30 seconds
D) 0.30-0.40 seconds
Answer: B
, Rationale: The normal PR interval is 0.12-0.20 seconds (3-5 small boxes),
measured from the beginning of the P wave to the beginning of the QRS complex .
11. What is the normal QRS duration?
A) 0.04-0.06 seconds
B) 0.06-0.10 seconds
C) 0.08-0.12 seconds
D) 0.12-0.16 seconds
Answer: B
Rationale: The normal QRS duration is 0.06-0.10 seconds (1.5-2.5 small boxes) .
12. What is the normal QT interval (corrected)?
A) Less than 0.30 seconds
B) Less than 0.40 seconds
C) Less than 0.44 seconds
D) Less than 0.50 seconds
Answer: C
Rationale: The corrected QT interval (QTc) should be less than 0.44 seconds. A
prolonged QT interval increases the risk of ventricular arrhythmias.
13. What is the normal heart rate range for an adult in sinus rhythm?
A) 40-60 bpm
B) 60-100 bpm
C) 100-150 bpm
D) 150-200 bpm
Answer: B
Rationale: Normal sinus rhythm in adults ranges from 60 to 100 beats per minute .
14. What are the characteristics of sinus tachycardia?
A) Rate: 40-60, regular rhythm
B) Rate: 60-100, irregular rhythm
C) Rate: 100-150, regular rhythm with P waves followed by QRS
D) Rate: 150-250, irregular rhythm with absent P waves
Answer: C
Rationale: Sinus tachycardia has a rate of 100-150 bpm with regular rhythm,
uniform P waves followed by QRS, and normal PR interval. Treatment involves
addressing the underlying cause .
15. What defines sinus bradycardia?
A) Sinus rhythm with rate less than 60 bpm
ANSWERS WITH RATIONALE LATEST UPDATE 2026-2027
ALREADY GRADED A+
This comprehensive question bank contains 400 multiple-choice questions
covering the Kaiser EKG Test Exam 2026 curriculum. It systematically
addresses cardiac conduction anatomy, electrophysiology, EKG waveform
interpretation, arrhythmia recognition, heart blocks, axis determination,
electrolyte disturbances, and pharmacological effects on the EKG. Key topics
include sinus rhythms, atrial and ventricular arrhythmias, bundle branch
blocks, ischemic changes, myocardial infarction patterns, pacemaker
evaluation, and ACLS treatment algorithms. Each question includes the
correct answer and detailed rationale explaining the underlying principles.
The progression from foundational concepts to advanced clinical scenarios
supports effective exam preparation for healthcare professionals pursuing
Kaiser EKG certification.
1. What is the correct sequence of the cardiac conduction system?
A) AV node → SA node → Bundle of His → Purkinje fibers
B) SA node → AV node → Bundle of His → Purkinje fibers
C) SA node → Bundle of His → AV node → Purkinje fibers
D) Purkinje fibers → Bundle of His → AV node → SA node
Answer: B
Rationale: The cardiac conduction pathway begins at the SA node (primary
pacemaker), travels to the AV node, then to the Bundle of His, and finally through
the Purkinje fibers to stimulate ventricular contraction .
2. What are the intrinsic rates of the heart's pacemakers?
A) SA Node: 40-60, AV Node: 20-40, Purkinje: 60-100
B) SA Node: 60-100, AV Node: 40-60, Purkinje: 20-40
C) SA Node: 20-40, AV Node: 60-100, Purkinje: 40-60
D) SA Node: 40-60, AV Node: 60-100, Purkinje: 20-40
Answer: B
,Rationale: The SA node (primary pacemaker) generates 60-100 beats per minute.
The AV node serves as backup at 40-60 bpm, and Purkinje fibers are the tertiary
pacemaker at 20-40 bpm.
3. Define depolarization.
A) Return of cell membrane to resting state
B) Electrical excitation of cell membrane followed by mechanical contraction
C) The period where cardiac cells cannot respond to stimulus
D) The period where cardiac cells respond to strong stimulus
Answer: B
Rationale: Depolarization is the electrical excitation of the cell membrane where
the inside becomes positive and outside negative, normally followed by
mechanical contraction .
4. Define repolarization.
A) Electrical excitation of cell membrane followed by mechanical contraction
B) The period where cardiac cells cannot respond to stimulus
C) Return of cell membrane to resting state (inside negative)
D) The period where cardiac cells respond to strong stimulus
Answer: C
Rationale: Repolarization is the return of the cell membrane to its resting state
where the inside becomes negative again, normally followed by mechanical
relaxation .
5. What is the absolute refractory period?
A) The period from the beginning of QRS to the peak of the T wave where cardiac
cells cannot respond to stimulus
B) The period where cardiac cells have repolarized enough to respond to strong
stimulus
C) The period between P wave and QRS complex
D) The period between T wave and next P wave
Answer: A
Rationale: The absolute refractory period is the time from the beginning of the
QRS complex to the peak of the T wave during which cardiac cells cannot respond
to any stimulus, regardless of strength.
6. What occurs during the relative refractory period?
A) Cardiac cells cannot respond to any stimulus
B) Cardiac cells have repolarized enough to respond to strong stimulus
C) Cardiac cells are completely depolarized
,D) Cardiac cells are in their resting state
Answer: B
Rationale: During the relative refractory period, cardiac cells have repolarized
enough to respond to a strong stimulus. This vulnerable period can lead to
arrhythmias if a strong stimulus occurs.
7. What does the P wave represent on an EKG?
A) Ventricular depolarization
B) Ventricular repolarization
C) Atrial depolarization
D) Atrial repolarization
Answer: C
Rationale: The P wave represents atrial depolarization, which is the electrical
activation of the atria preceding atrial contraction .
8. What does the QRS complex represent?
A) Atrial depolarization
B) Ventricular depolarization
C) Ventricular repolarization
D) Atrial repolarization
Answer: B
Rationale: The QRS complex represents ventricular depolarization, which is the
electrical activation of the ventricles preceding ventricular contraction .
9. What does the T wave represent?
A) Atrial depolarization
B) Ventricular depolarization
C) Ventricular repolarization
D) Atrial repolarization
Answer: C
Rationale: The T wave represents ventricular repolarization, which is the recovery
of the ventricles to their resting electrical state .
10. What is the normal PR interval duration?
A) 0.06-0.10 seconds
B) 0.12-0.20 seconds
C) 0.20-0.30 seconds
D) 0.30-0.40 seconds
Answer: B
, Rationale: The normal PR interval is 0.12-0.20 seconds (3-5 small boxes),
measured from the beginning of the P wave to the beginning of the QRS complex .
11. What is the normal QRS duration?
A) 0.04-0.06 seconds
B) 0.06-0.10 seconds
C) 0.08-0.12 seconds
D) 0.12-0.16 seconds
Answer: B
Rationale: The normal QRS duration is 0.06-0.10 seconds (1.5-2.5 small boxes) .
12. What is the normal QT interval (corrected)?
A) Less than 0.30 seconds
B) Less than 0.40 seconds
C) Less than 0.44 seconds
D) Less than 0.50 seconds
Answer: C
Rationale: The corrected QT interval (QTc) should be less than 0.44 seconds. A
prolonged QT interval increases the risk of ventricular arrhythmias.
13. What is the normal heart rate range for an adult in sinus rhythm?
A) 40-60 bpm
B) 60-100 bpm
C) 100-150 bpm
D) 150-200 bpm
Answer: B
Rationale: Normal sinus rhythm in adults ranges from 60 to 100 beats per minute .
14. What are the characteristics of sinus tachycardia?
A) Rate: 40-60, regular rhythm
B) Rate: 60-100, irregular rhythm
C) Rate: 100-150, regular rhythm with P waves followed by QRS
D) Rate: 150-250, irregular rhythm with absent P waves
Answer: C
Rationale: Sinus tachycardia has a rate of 100-150 bpm with regular rhythm,
uniform P waves followed by QRS, and normal PR interval. Treatment involves
addressing the underlying cause .
15. What defines sinus bradycardia?
A) Sinus rhythm with rate less than 60 bpm
