ADVENT HEALTH EKG
COMPREHENSIVE EXAM 2026/2027
QUESTIONS AND ANSWERS
1. Where is the primary pacemaker of the heart, the Sinoatrial (SA) node, located?
A. In the superior portion of the interventricular septum
B. In the lower part of the interatrial septum
C. In the upper wall of the right atrium
D. In the wall of the left atrium
Answer: C
Conceptual Explanation: The SA node is located in the superior portion of the right
atrium, near the entrance of the superior vena cava.
2. What is the physiological purpose of the delay at the Atrioventricular (AV) node?
A. To increase the heart rate during exercise
B. To prevent the atria from contracting too early
C. To allow the ventricles to fill completely before contraction
,D. To speed up the conduction to the Purkinje fibers
Answer: C
Conceptual Explanation: The AV node delay ensures that the atria have sufficient time to
contract and empty their blood into the ventricles (atrial kick) before ventricular systole
begins.
3. What does the P-wave on an EKG strip represent?
A. Ventricular depolarization
B. Atrial repolarization
C. Atrial depolarization
D. Ventricular repolarization
Answer: C
Conceptual Explanation: The P-wave represents the electrical impulse spreading through
the atria, causing them to depolarize.
4. What is the normal duration range for a PR interval?
A. 0.04 to 0.10 seconds
B. 0.20 to 0.40 seconds
C. 0.12 to 0.20 seconds
D. 0.06 to 0.12 seconds
, Answer: C
Conceptual Explanation: A normal PR interval, measured from the start of the P-wave to
the start of the QRS complex, ranges from 0.12 to 0.20 seconds (3 to 5 small boxes).
5. A QRS complex that measures 0.14 seconds is considered:
A. Normal duration
B. Wide complex
C. Narrow complex
D. Junctional origin
Answer: B
Conceptual Explanation: A normal QRS duration is less than 0.12 seconds. A
measurement of 0.12 seconds or greater (like 0.14s) is considered wide, often indicating a
bundle branch block or ventricular origin.
6. Which rhythm is characterized by a heart rate of 45 bpm, normal P-waves, and a regular
rhythm?
A. Sinus Bradycardia
B. Junctional Rhythm
C. Sinus Tachycardia
D. Idioventricular Rhythm
Answer: A
COMPREHENSIVE EXAM 2026/2027
QUESTIONS AND ANSWERS
1. Where is the primary pacemaker of the heart, the Sinoatrial (SA) node, located?
A. In the superior portion of the interventricular septum
B. In the lower part of the interatrial septum
C. In the upper wall of the right atrium
D. In the wall of the left atrium
Answer: C
Conceptual Explanation: The SA node is located in the superior portion of the right
atrium, near the entrance of the superior vena cava.
2. What is the physiological purpose of the delay at the Atrioventricular (AV) node?
A. To increase the heart rate during exercise
B. To prevent the atria from contracting too early
C. To allow the ventricles to fill completely before contraction
,D. To speed up the conduction to the Purkinje fibers
Answer: C
Conceptual Explanation: The AV node delay ensures that the atria have sufficient time to
contract and empty their blood into the ventricles (atrial kick) before ventricular systole
begins.
3. What does the P-wave on an EKG strip represent?
A. Ventricular depolarization
B. Atrial repolarization
C. Atrial depolarization
D. Ventricular repolarization
Answer: C
Conceptual Explanation: The P-wave represents the electrical impulse spreading through
the atria, causing them to depolarize.
4. What is the normal duration range for a PR interval?
A. 0.04 to 0.10 seconds
B. 0.20 to 0.40 seconds
C. 0.12 to 0.20 seconds
D. 0.06 to 0.12 seconds
, Answer: C
Conceptual Explanation: A normal PR interval, measured from the start of the P-wave to
the start of the QRS complex, ranges from 0.12 to 0.20 seconds (3 to 5 small boxes).
5. A QRS complex that measures 0.14 seconds is considered:
A. Normal duration
B. Wide complex
C. Narrow complex
D. Junctional origin
Answer: B
Conceptual Explanation: A normal QRS duration is less than 0.12 seconds. A
measurement of 0.12 seconds or greater (like 0.14s) is considered wide, often indicating a
bundle branch block or ventricular origin.
6. Which rhythm is characterized by a heart rate of 45 bpm, normal P-waves, and a regular
rhythm?
A. Sinus Bradycardia
B. Junctional Rhythm
C. Sinus Tachycardia
D. Idioventricular Rhythm
Answer: A
