ADVENT HEALTH EKG
COMPREHENSIVE REVIEW EXAM
QUESTIONS AND ANSWERS
1. A patient’s EKG shows a PR interval of 0.24 seconds with a constant relationship to the
QRS. What is the most likely interpretation?
A. Second-degree AV block Mobitz Type I
B. Normal Sinus Rhythm
C. Third-degree AV block
D. First-degree AV block
Answer: D
Conceptual Explanation: First-degree AV block is characterized by a PR interval greater
than 0.20 seconds that remains constant throughout the rhythm.
2. In Wenckebach (Mobitz I), what is the typical pattern of the PR interval?
A. Constant PR interval followed by a dropped QRS
B. Progressive shortening of the PR interval
C. Variable PR interval with no relationship to QRS
,D. Progressive lengthening of the PR interval until a QRS is dropped
Answer: D
Conceptual Explanation: Mobitz Type I (Wenckebach) involves a repetitive cycle where
the PR interval gradually lengthens until an atrial impulse is not conducted, resulting in a
dropped QRS.
3. Which rhythm is characterized by a ‘sawtooth’ pattern of P-waves?
A. Atrial Fibrillation
B. Ventricular Tachycardia
C. Sinus Tachycardia
D. Atrial Flutter
Answer: D
Conceptual Explanation: Atrial Flutter typically exhibits a rapid, regular ‘sawtooth’
pattern (F waves) occurring at a rate of 250-350 bpm.
4. A life-threatening rhythm where the ventricles quiver and there is no cardiac output is:
A. Ventricular Tachycardia
B. Atrial Fibrillation
C. Asystole
D. Ventricular Fibrillation
, Answer: D
Conceptual Explanation: Ventricular Fibrillation is a chaotic, disorganized rhythm that
results in no effective contraction of the ventricles, requiring immediate defibrillation.
5. What is the normal duration of a QRS complex?
A. 0.12 to 0.20 seconds
B. Less than 0.04 seconds
C. 0.20 to 0.40 seconds
D. 0.06 to 0.10 seconds
Answer: D
Conceptual Explanation: The normal QRS duration is typically 0.06 to 0.10 seconds. A
duration of 0.12 seconds or greater indicates a conduction delay.
6. Which of the following defines Third-Degree AV block?
A. The PR interval is consistently 0.22 seconds
B. A QRS is dropped every three beats
C. The P-waves and QRS complexes have no relationship
D. The heart rate is always 150 bpm
Answer: C
COMPREHENSIVE REVIEW EXAM
QUESTIONS AND ANSWERS
1. A patient’s EKG shows a PR interval of 0.24 seconds with a constant relationship to the
QRS. What is the most likely interpretation?
A. Second-degree AV block Mobitz Type I
B. Normal Sinus Rhythm
C. Third-degree AV block
D. First-degree AV block
Answer: D
Conceptual Explanation: First-degree AV block is characterized by a PR interval greater
than 0.20 seconds that remains constant throughout the rhythm.
2. In Wenckebach (Mobitz I), what is the typical pattern of the PR interval?
A. Constant PR interval followed by a dropped QRS
B. Progressive shortening of the PR interval
C. Variable PR interval with no relationship to QRS
,D. Progressive lengthening of the PR interval until a QRS is dropped
Answer: D
Conceptual Explanation: Mobitz Type I (Wenckebach) involves a repetitive cycle where
the PR interval gradually lengthens until an atrial impulse is not conducted, resulting in a
dropped QRS.
3. Which rhythm is characterized by a ‘sawtooth’ pattern of P-waves?
A. Atrial Fibrillation
B. Ventricular Tachycardia
C. Sinus Tachycardia
D. Atrial Flutter
Answer: D
Conceptual Explanation: Atrial Flutter typically exhibits a rapid, regular ‘sawtooth’
pattern (F waves) occurring at a rate of 250-350 bpm.
4. A life-threatening rhythm where the ventricles quiver and there is no cardiac output is:
A. Ventricular Tachycardia
B. Atrial Fibrillation
C. Asystole
D. Ventricular Fibrillation
, Answer: D
Conceptual Explanation: Ventricular Fibrillation is a chaotic, disorganized rhythm that
results in no effective contraction of the ventricles, requiring immediate defibrillation.
5. What is the normal duration of a QRS complex?
A. 0.12 to 0.20 seconds
B. Less than 0.04 seconds
C. 0.20 to 0.40 seconds
D. 0.06 to 0.10 seconds
Answer: D
Conceptual Explanation: The normal QRS duration is typically 0.06 to 0.10 seconds. A
duration of 0.12 seconds or greater indicates a conduction delay.
6. Which of the following defines Third-Degree AV block?
A. The PR interval is consistently 0.22 seconds
B. A QRS is dropped every three beats
C. The P-waves and QRS complexes have no relationship
D. The heart rate is always 150 bpm
Answer: C
