EKG CLEP FINAL EXAM
COMPREHENSIVE MASTERY
QUESTIONS WITH VERIFIED
ANSWERS.NEW UPDATE. JUST
RELEASED
1. Which electrolyte abnormality is most commonly associated with the presence of
prominent U-waves and a flattened T-wave on an EKG?
A. Hypercalcemia
B. Hyponatremia
C. Hyperkalemia
D. Hypokalemia
Answer: D
Conceptual Explanation: Hypokalemia typically presents with flattened T-waves, ST-
segment depression, and the appearance of U-waves, which follow the T-wave.
2. In the setting of a suspected myocardial infarction, ST-segment elevation in leads V3 and
V4 is most indicative of occlusion in which coronary artery?
A. Right Coronary Artery (RCA)
B. Left Circumflex Artery (LCx)
,C. Posterior Descending Artery (PDA)
D. Left Anterior Descending Artery (LAD)
Answer: D
Conceptual Explanation: Leads V3 and V4 correspond to the anterior wall of the left
ventricle, which is primarily supplied by the Left Anterior Descending (LAD) artery.
3. What is the intrinsic firing rate of the Atrioventricular (AV) node when the SA node fails to
initiate an impulse?
A. 60-100 bpm
B. 20-40 bpm
C. 100-120 bpm
D. 40-60 bpm
Answer: D
Conceptual Explanation: The AV node serves as a secondary pacemaker with an inherent
rate of 40-60 beats per minute.
4. A patient presents with a rhythm showing a regular PR interval of 0.24 seconds and a
constant 1:1 P-to-QRS ratio. This is diagnosed as:
A. Second-degree Mobitz II block
B. Second-degree Mobitz I block
C. First-degree AV block
, D. Third-degree AV block
Answer: C
Conceptual Explanation: First-degree AV block is characterized solely by a prolonged PR
interval greater than 0.20 seconds without dropped beats.
5. Which EKG finding is considered pathognomonic for Wolff-Parkinson-White (WPW)
syndrome?
A. Delta wave
B. Prolonged QT interval
C. Sawtooth P-waves
D. Inverted T-waves in V1-V3
Answer: A
Conceptual Explanation: WPW syndrome involves an accessory pathway (Bundle of
Kent) resulting in a short PR interval and a slurred upstroke of the QRS complex known as
a delta wave.
6. What is the standard paper speed for a diagnostic 12-lead EKG?
A. 50 mm/sec
B. 10 mm/sec
C. 25 mm/sec
D. 5 mm/sec
COMPREHENSIVE MASTERY
QUESTIONS WITH VERIFIED
ANSWERS.NEW UPDATE. JUST
RELEASED
1. Which electrolyte abnormality is most commonly associated with the presence of
prominent U-waves and a flattened T-wave on an EKG?
A. Hypercalcemia
B. Hyponatremia
C. Hyperkalemia
D. Hypokalemia
Answer: D
Conceptual Explanation: Hypokalemia typically presents with flattened T-waves, ST-
segment depression, and the appearance of U-waves, which follow the T-wave.
2. In the setting of a suspected myocardial infarction, ST-segment elevation in leads V3 and
V4 is most indicative of occlusion in which coronary artery?
A. Right Coronary Artery (RCA)
B. Left Circumflex Artery (LCx)
,C. Posterior Descending Artery (PDA)
D. Left Anterior Descending Artery (LAD)
Answer: D
Conceptual Explanation: Leads V3 and V4 correspond to the anterior wall of the left
ventricle, which is primarily supplied by the Left Anterior Descending (LAD) artery.
3. What is the intrinsic firing rate of the Atrioventricular (AV) node when the SA node fails to
initiate an impulse?
A. 60-100 bpm
B. 20-40 bpm
C. 100-120 bpm
D. 40-60 bpm
Answer: D
Conceptual Explanation: The AV node serves as a secondary pacemaker with an inherent
rate of 40-60 beats per minute.
4. A patient presents with a rhythm showing a regular PR interval of 0.24 seconds and a
constant 1:1 P-to-QRS ratio. This is diagnosed as:
A. Second-degree Mobitz II block
B. Second-degree Mobitz I block
C. First-degree AV block
, D. Third-degree AV block
Answer: C
Conceptual Explanation: First-degree AV block is characterized solely by a prolonged PR
interval greater than 0.20 seconds without dropped beats.
5. Which EKG finding is considered pathognomonic for Wolff-Parkinson-White (WPW)
syndrome?
A. Delta wave
B. Prolonged QT interval
C. Sawtooth P-waves
D. Inverted T-waves in V1-V3
Answer: A
Conceptual Explanation: WPW syndrome involves an accessory pathway (Bundle of
Kent) resulting in a short PR interval and a slurred upstroke of the QRS complex known as
a delta wave.
6. What is the standard paper speed for a diagnostic 12-lead EKG?
A. 50 mm/sec
B. 10 mm/sec
C. 25 mm/sec
D. 5 mm/sec
