CRAT EXAM AND PRACTICE EXAM NEWEST 2025) WITH 100
REAL EXAM QUESTIONS AND CORRECT DETAILED ANSWERS
GRADED A+| CERTIFIED RHYTHM ANALYSIS TECHNICIAN
EXAM PREP 2025
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1. The normal pacemaker of the heart is the:
A. AV node
B. Purkinje fibers
C. SA node
D. Bundle of His
**Answer: C**
2. The P wave represents:
A. Ventricular depolarization
B. Atrial depolarization
C. Ventricular repolarization
D. Atrial repolarization
**Answer: B**
3. The PR interval normally measures:
A. 0.04–0.10 sec
B. 0.12–0.20 sec
C. 0.20–0.30 sec
D. >0.30 sec
**Answer: B**
4. The QRS complex duration normally is:
A. <0.10 sec
B. 0.10–0.12 sec
C. <0.12 sec
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, D. 0.16–0.20 sec
**Answer: C**
5. ST elevation in contiguous leads most suggests:
A. Atrial fibrillation
B. Acute myocardial infarction
C. Pericarditis only
D. Hypokalemia
**Answer: B**
6. Atrial fibrillation on telemetry is characterized by:
A. Regular narrow QRS and sawtooth P waves
B. Irregularly irregular rhythm with absent distinct P waves
C. Regular rhythm with long PR intervals
D. Wide QRS complexes at a slow rate
**Answer: B**
7. Ventricular tachycardia is best described as:
A. Three or more consecutive PVCs at >100 bpm
B. Single PVC only
C. Atrial tachycardia with aberrancy
D. Sinus tachycardia >100 bpm
**Answer: A**
8. A premature ventricular contraction (PVC) typically produces:
A. Narrow QRS preceded by a P wave
B. Wide, bizarre QRS not preceded by a P wave
C. Absent QRS complex
D. Atrial rate increase
**Answer: B**
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, 9. Second-degree AV block Mobitz I (Wenckebach) shows:
A. Constant PR interval with dropped beats
B. Progressive PR prolongation followed by dropped QRS
C. Random dropped beats with no pattern
D. No P waves present
**Answer: B**
10. Second-degree AV block Mobitz II is characterized by:
A. Progressive PR lengthening before a drop
B. Sudden dropped QRS without PR prolongation
C. No conduction of any impulses
D. Irregular atrial rhythm
**Answer: B**
11. Third-degree (complete) heart block typically shows:
A. AV dissociation with independent P and QRS rates
B. No P waves at all
C. PR interval constantly shortened
D. Only PVCs present
**Answer: A**
12. Torsades de pointes is a form of:
A. Monomorphic VT
B. Polymorphic VT associated with prolonged QT
C. SVT with aberrancy
D. Ventricular standstill
**Answer: B**
13. The normal axis of the heart on ECG falls between:
A. −90° and 0°
B. 0° and +90°
C. +90° and +180°
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REAL EXAM QUESTIONS AND CORRECT DETAILED ANSWERS
GRADED A+| CERTIFIED RHYTHM ANALYSIS TECHNICIAN
EXAM PREP 2025
---
1. The normal pacemaker of the heart is the:
A. AV node
B. Purkinje fibers
C. SA node
D. Bundle of His
**Answer: C**
2. The P wave represents:
A. Ventricular depolarization
B. Atrial depolarization
C. Ventricular repolarization
D. Atrial repolarization
**Answer: B**
3. The PR interval normally measures:
A. 0.04–0.10 sec
B. 0.12–0.20 sec
C. 0.20–0.30 sec
D. >0.30 sec
**Answer: B**
4. The QRS complex duration normally is:
A. <0.10 sec
B. 0.10–0.12 sec
C. <0.12 sec
Page 1 of 23
, D. 0.16–0.20 sec
**Answer: C**
5. ST elevation in contiguous leads most suggests:
A. Atrial fibrillation
B. Acute myocardial infarction
C. Pericarditis only
D. Hypokalemia
**Answer: B**
6. Atrial fibrillation on telemetry is characterized by:
A. Regular narrow QRS and sawtooth P waves
B. Irregularly irregular rhythm with absent distinct P waves
C. Regular rhythm with long PR intervals
D. Wide QRS complexes at a slow rate
**Answer: B**
7. Ventricular tachycardia is best described as:
A. Three or more consecutive PVCs at >100 bpm
B. Single PVC only
C. Atrial tachycardia with aberrancy
D. Sinus tachycardia >100 bpm
**Answer: A**
8. A premature ventricular contraction (PVC) typically produces:
A. Narrow QRS preceded by a P wave
B. Wide, bizarre QRS not preceded by a P wave
C. Absent QRS complex
D. Atrial rate increase
**Answer: B**
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, 9. Second-degree AV block Mobitz I (Wenckebach) shows:
A. Constant PR interval with dropped beats
B. Progressive PR prolongation followed by dropped QRS
C. Random dropped beats with no pattern
D. No P waves present
**Answer: B**
10. Second-degree AV block Mobitz II is characterized by:
A. Progressive PR lengthening before a drop
B. Sudden dropped QRS without PR prolongation
C. No conduction of any impulses
D. Irregular atrial rhythm
**Answer: B**
11. Third-degree (complete) heart block typically shows:
A. AV dissociation with independent P and QRS rates
B. No P waves at all
C. PR interval constantly shortened
D. Only PVCs present
**Answer: A**
12. Torsades de pointes is a form of:
A. Monomorphic VT
B. Polymorphic VT associated with prolonged QT
C. SVT with aberrancy
D. Ventricular standstill
**Answer: B**
13. The normal axis of the heart on ECG falls between:
A. −90° and 0°
B. 0° and +90°
C. +90° and +180°
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