ADVENT HEALTH EKG EXAM STUDY
GUIDE (2026/2027) QUESTIONS AND
ANSWERS
1. Which of the following describes the electrical conduction pathway in a healthy heart?
A. AV node -> SA node -> Bundle of His -> Purkinje fibers
B. SA node -> AV node -> Bundle of His -> Purkinje fibers
C. Purkinje fibers -> Bundle of His -> AV node -> SA node
D. SA node -> Purkinje fibers -> AV node -> Bundle of His
Answer: B
Conceptual Explanation: The normal sequence of electrical conduction starts at the
Sinoatrial (SA) node, travels to the Atrioventricular (AV) node, moves through the Bundle
of His, and finally spreads via the Purkinje fibers.
2. A PR interval is considered prolonged if it is greater than:
A. 0.20 seconds
B. 0.12 seconds
C. 0.10 seconds
,D. 0.25 seconds
Answer: A
Conceptual Explanation: A normal PR interval ranges from 0.12 to 0.20 seconds. Anything
greater than 0.20 seconds (one large box) indicates a first-degree AV block.
3. On a standard EKG grid, what time duration does one small square represent?
A. 0.20 seconds
B. 0.01 seconds
C. 0.10 seconds
D. 0.04 seconds
Answer: D
Conceptual Explanation: One small square on EKG paper represents 0.04 seconds. Five
small squares make up one large box, which represents 0.20 seconds.
4. Which heart rhythm is characterized by a ‘sawtooth’ pattern of P-waves?
A. Atrial Fibrillation
B. Ventricular Tachycardia
C. Atrial Flutter
D. Sinus Arrhythmia
Answer: C
, Conceptual Explanation: Atrial Flutter is distinguished by rapid, regular atrial oscillations
that resemble the teeth of a saw, known as F-waves.
5. In a 3rd-degree (Complete) AV block, what is the relationship between the P-waves and
QRS complexes?
A. There is a constant PR interval
B. There is no relationship between P-waves and QRS complexes
C. The PR interval progressively lengthens
D. Every other P-wave is blocked
Answer: B
Conceptual Explanation: In 3rd-degree AV block, the atria and ventricles beat
independently of each other (AV dissociation), meaning there is no consistent PR interval.
6. Which medication is the first-line treatment for a patient in stable Supraventricular
Tachycardia (SVT)?
A. Adenosine
B. Amiodarone
C. Atropine
D. Epinephrine
Answer: A
GUIDE (2026/2027) QUESTIONS AND
ANSWERS
1. Which of the following describes the electrical conduction pathway in a healthy heart?
A. AV node -> SA node -> Bundle of His -> Purkinje fibers
B. SA node -> AV node -> Bundle of His -> Purkinje fibers
C. Purkinje fibers -> Bundle of His -> AV node -> SA node
D. SA node -> Purkinje fibers -> AV node -> Bundle of His
Answer: B
Conceptual Explanation: The normal sequence of electrical conduction starts at the
Sinoatrial (SA) node, travels to the Atrioventricular (AV) node, moves through the Bundle
of His, and finally spreads via the Purkinje fibers.
2. A PR interval is considered prolonged if it is greater than:
A. 0.20 seconds
B. 0.12 seconds
C. 0.10 seconds
,D. 0.25 seconds
Answer: A
Conceptual Explanation: A normal PR interval ranges from 0.12 to 0.20 seconds. Anything
greater than 0.20 seconds (one large box) indicates a first-degree AV block.
3. On a standard EKG grid, what time duration does one small square represent?
A. 0.20 seconds
B. 0.01 seconds
C. 0.10 seconds
D. 0.04 seconds
Answer: D
Conceptual Explanation: One small square on EKG paper represents 0.04 seconds. Five
small squares make up one large box, which represents 0.20 seconds.
4. Which heart rhythm is characterized by a ‘sawtooth’ pattern of P-waves?
A. Atrial Fibrillation
B. Ventricular Tachycardia
C. Atrial Flutter
D. Sinus Arrhythmia
Answer: C
, Conceptual Explanation: Atrial Flutter is distinguished by rapid, regular atrial oscillations
that resemble the teeth of a saw, known as F-waves.
5. In a 3rd-degree (Complete) AV block, what is the relationship between the P-waves and
QRS complexes?
A. There is a constant PR interval
B. There is no relationship between P-waves and QRS complexes
C. The PR interval progressively lengthens
D. Every other P-wave is blocked
Answer: B
Conceptual Explanation: In 3rd-degree AV block, the atria and ventricles beat
independently of each other (AV dissociation), meaning there is no consistent PR interval.
6. Which medication is the first-line treatment for a patient in stable Supraventricular
Tachycardia (SVT)?
A. Adenosine
B. Amiodarone
C. Atropine
D. Epinephrine
Answer: A
