1|Page
KAISER EKG ACTUAL EXAM PREP 2026
ALL 150 QUESTIONS AND CORRECT
DETAILED ANSWERS WITH
RATIONALE ALREADY A GRADED
WITH EXPERT FEEDBACK |
CURRENTLY TESTING |NEW AND
REVISED !!!
1. The normal duration of the PR interval in an adult is:
A. 0.04–0.10 seconds
B. 0.12–0.20 seconds
C. 0.20–0.30 seconds
D. 0.30–0.40 seconds
The PR interval reflects AV nodal conduction time. Normal range is
0.12–0.20 seconds; longer suggests AV block.
2. A QRS duration greater than 0.12 seconds most commonly
indicates:
A. Sinus bradycardia
B. Atrial enlargement
C. Bundle branch block or ventricular rhythm
D. First-degree AV block
Wide QRS complexes reflect delayed ventricular depolarization,
commonly due to bundle branch block or ventricular origin.
3. A patient with an irregularly irregular rhythm and absent P waves
most likely has:
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A. Atrial flutter
B. Sinus arrhythmia
C. Atrial fibrillation
D. Junctional rhythm
Atrial fibrillation is characterized by no organized P waves and an
irregularly irregular ventricular response.
4. ST-segment elevation in leads II, III, and aVF suggests:
A. Anterior wall MI
B. Lateral wall MI
C. Inferior wall MI
D. Septal ischemia
Leads II, III, aVF view the inferior wall supplied typically by the right
coronary artery.
5. The primary pacemaker of the heart is the:
A. AV node
B. Bundle of His
C. Purkinje fibers
D. Sinoatrial (SA) node
The SA node has the highest intrinsic firing rate and sets normal sinus
rhythm.
6. A ventricular rate of 38 bpm with normal P waves preceding each
QRS indicates:
A. Junctional bradycardia
B. Sinus bradycardia
C. Third-degree AV block
D. Ventricular escape rhythm
Normal P-QRS relationship with slow rate indicates sinus
bradycardia.
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7. In second-degree AV block type II:
A. PR interval progressively lengthens
B. All P waves are conducted
C. PR interval is constant with dropped QRS complexes
D. QRS is always narrow
Mobitz II presents with fixed PR intervals and intermittent non-
conducted P waves.
8. The hallmark of atrial flutter is:
A. Absent atrial activity
B. Sawtooth flutter waves
C. Wide QRS complexes
D. Peaked T waves
Atrial flutter produces classic sawtooth F waves, typically 250–350
bpm atrial rate.
9. A patient in ventricular tachycardia without a pulse requires:
A. Atropine
B. Adenosine
C. Immediate defibrillation
D. Synchronized cardioversion
Pulseless VT is treated as cardiac arrest with unsynchronized
defibrillation.
10. Hyperkalemia most commonly produces:
A. Flattened T waves
B. Peaked T waves
C. ST elevation
D. Short QT interval
Elevated potassium causes tall, peaked T waves due to accelerated
repolarization.
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11. The QT interval represents:
A. Atrial depolarization
B. AV conduction
C. Ventricular depolarization and repolarization
D. SA node firing
QT includes QRS through end of T wave.
12. A junctional rhythm typically has:
A. Upright P waves before QRS
B. Absent or inverted P waves
C. Wide QRS >0.14
D. Sawtooth waves
Impulses originate near AV node; P waves may be inverted or absent.
13. The correct paper speed for standard EKG is:
A. 10 mm/sec
B. 15 mm/sec
C. 25 mm/sec
D. 50 mm/sec
Standard calibration is 25 mm/sec.
14. One small box equals:
A. 0.01 sec
B. 0.04 sec
C. 0.10 sec
D. 0.20 sec
At 25 mm/sec, each small box equals 0.04 seconds.
15. Electrical axis deviation to the left may indicate:
A. RV hypertrophy
B. COPD
C. Left ventricular hypertrophy
D. Hyperkalemia
KAISER EKG ACTUAL EXAM PREP 2026
ALL 150 QUESTIONS AND CORRECT
DETAILED ANSWERS WITH
RATIONALE ALREADY A GRADED
WITH EXPERT FEEDBACK |
CURRENTLY TESTING |NEW AND
REVISED !!!
1. The normal duration of the PR interval in an adult is:
A. 0.04–0.10 seconds
B. 0.12–0.20 seconds
C. 0.20–0.30 seconds
D. 0.30–0.40 seconds
The PR interval reflects AV nodal conduction time. Normal range is
0.12–0.20 seconds; longer suggests AV block.
2. A QRS duration greater than 0.12 seconds most commonly
indicates:
A. Sinus bradycardia
B. Atrial enlargement
C. Bundle branch block or ventricular rhythm
D. First-degree AV block
Wide QRS complexes reflect delayed ventricular depolarization,
commonly due to bundle branch block or ventricular origin.
3. A patient with an irregularly irregular rhythm and absent P waves
most likely has:
,2|Page
A. Atrial flutter
B. Sinus arrhythmia
C. Atrial fibrillation
D. Junctional rhythm
Atrial fibrillation is characterized by no organized P waves and an
irregularly irregular ventricular response.
4. ST-segment elevation in leads II, III, and aVF suggests:
A. Anterior wall MI
B. Lateral wall MI
C. Inferior wall MI
D. Septal ischemia
Leads II, III, aVF view the inferior wall supplied typically by the right
coronary artery.
5. The primary pacemaker of the heart is the:
A. AV node
B. Bundle of His
C. Purkinje fibers
D. Sinoatrial (SA) node
The SA node has the highest intrinsic firing rate and sets normal sinus
rhythm.
6. A ventricular rate of 38 bpm with normal P waves preceding each
QRS indicates:
A. Junctional bradycardia
B. Sinus bradycardia
C. Third-degree AV block
D. Ventricular escape rhythm
Normal P-QRS relationship with slow rate indicates sinus
bradycardia.
,3|Page
7. In second-degree AV block type II:
A. PR interval progressively lengthens
B. All P waves are conducted
C. PR interval is constant with dropped QRS complexes
D. QRS is always narrow
Mobitz II presents with fixed PR intervals and intermittent non-
conducted P waves.
8. The hallmark of atrial flutter is:
A. Absent atrial activity
B. Sawtooth flutter waves
C. Wide QRS complexes
D. Peaked T waves
Atrial flutter produces classic sawtooth F waves, typically 250–350
bpm atrial rate.
9. A patient in ventricular tachycardia without a pulse requires:
A. Atropine
B. Adenosine
C. Immediate defibrillation
D. Synchronized cardioversion
Pulseless VT is treated as cardiac arrest with unsynchronized
defibrillation.
10. Hyperkalemia most commonly produces:
A. Flattened T waves
B. Peaked T waves
C. ST elevation
D. Short QT interval
Elevated potassium causes tall, peaked T waves due to accelerated
repolarization.
, 4|Page
11. The QT interval represents:
A. Atrial depolarization
B. AV conduction
C. Ventricular depolarization and repolarization
D. SA node firing
QT includes QRS through end of T wave.
12. A junctional rhythm typically has:
A. Upright P waves before QRS
B. Absent or inverted P waves
C. Wide QRS >0.14
D. Sawtooth waves
Impulses originate near AV node; P waves may be inverted or absent.
13. The correct paper speed for standard EKG is:
A. 10 mm/sec
B. 15 mm/sec
C. 25 mm/sec
D. 50 mm/sec
Standard calibration is 25 mm/sec.
14. One small box equals:
A. 0.01 sec
B. 0.04 sec
C. 0.10 sec
D. 0.20 sec
At 25 mm/sec, each small box equals 0.04 seconds.
15. Electrical axis deviation to the left may indicate:
A. RV hypertrophy
B. COPD
C. Left ventricular hypertrophy
D. Hyperkalemia
