RELIAS ADVANCED DYSRHYTHMIA
EXAM A QUESTIONS AND ANSWERS
1. Which characteristic is definitive for a First-Degree AV Block?
A. A PR interval greater than 0.20 seconds that remains constant
B. Progressive lengthening of the PR interval until a QRS is dropped
C. More P waves than QRS complexes with a fixed PR interval
D. Complete dissociation between atria and ventricles
Answer: A
Conceptual Explanation: First-degree AV block is characterized by a delayed but
consistent conduction through the AV node, resulting in a PR interval > 0.20 seconds.
2. In a Second-Degree AV Block Type I (Wenckebach), what happens to the PR interval?
A. It remains constant before a QRS is dropped
B. It shortens until a P wave is conducted early
C. It is completely absent due to atrial fibrillation
D. It progressively lengthens until a QRS complex is dropped
,Answer: D
Conceptual Explanation: Second-degree AV block Type I is identified by a progressive
prolongation of the PR interval followed by a non-conducted P wave (dropped QRS).
3. What is the initial drug of choice for a stable patient with symptomatic Supraventricular
Tachycardia (SVT)?
A. Amiodarone 150mg IV
B. Epinephrine 1mg IV
C. Adenosine 6mg rapid IV push
D. Atropine 0.5mg IV
Answer: C
Conceptual Explanation: Adenosine is the primary pharmacological intervention for
stable SVT to slow or stop conduction through the AV node.
4. A patient’s EKG shows a ‘sawtooth’ pattern with an atrial rate of 300 bpm. What is the
most likely rhythm?
A. Atrial Flutter
B. Atrial Fibrillation
C. Ventricular Tachycardia
D. Sinus Tachycardia
Answer: A
, Conceptual Explanation: Atrial flutter is classically identified by a regular sawtooth-
shaped F-wave pattern.
5. Which rhythm is characterized by an ‘irregularly irregular’ rhythm with no discernible P
waves?
A. Sinus Arrhythmia
B. Atrial Fibrillation
C. Atrial Flutter
D. Junctional Rhythm
Answer: B
Conceptual Explanation: Atrial Fibrillation lacks organized P waves and has an irregularly
irregular ventricular response.
6. What is the standard PR interval range for a Normal Sinus Rhythm?
A. 0.10 to 0.25 seconds
B. 0.04 to 0.12 seconds
C. 0.12 to 0.20 seconds
D. 0.20 to 0.40 seconds
Answer: C
Conceptual Explanation: A normal PR interval reflects the time taken for electrical
impulse to travel from the SA node to the ventricles, normally 0.12-0.20 seconds.
EXAM A QUESTIONS AND ANSWERS
1. Which characteristic is definitive for a First-Degree AV Block?
A. A PR interval greater than 0.20 seconds that remains constant
B. Progressive lengthening of the PR interval until a QRS is dropped
C. More P waves than QRS complexes with a fixed PR interval
D. Complete dissociation between atria and ventricles
Answer: A
Conceptual Explanation: First-degree AV block is characterized by a delayed but
consistent conduction through the AV node, resulting in a PR interval > 0.20 seconds.
2. In a Second-Degree AV Block Type I (Wenckebach), what happens to the PR interval?
A. It remains constant before a QRS is dropped
B. It shortens until a P wave is conducted early
C. It is completely absent due to atrial fibrillation
D. It progressively lengthens until a QRS complex is dropped
,Answer: D
Conceptual Explanation: Second-degree AV block Type I is identified by a progressive
prolongation of the PR interval followed by a non-conducted P wave (dropped QRS).
3. What is the initial drug of choice for a stable patient with symptomatic Supraventricular
Tachycardia (SVT)?
A. Amiodarone 150mg IV
B. Epinephrine 1mg IV
C. Adenosine 6mg rapid IV push
D. Atropine 0.5mg IV
Answer: C
Conceptual Explanation: Adenosine is the primary pharmacological intervention for
stable SVT to slow or stop conduction through the AV node.
4. A patient’s EKG shows a ‘sawtooth’ pattern with an atrial rate of 300 bpm. What is the
most likely rhythm?
A. Atrial Flutter
B. Atrial Fibrillation
C. Ventricular Tachycardia
D. Sinus Tachycardia
Answer: A
, Conceptual Explanation: Atrial flutter is classically identified by a regular sawtooth-
shaped F-wave pattern.
5. Which rhythm is characterized by an ‘irregularly irregular’ rhythm with no discernible P
waves?
A. Sinus Arrhythmia
B. Atrial Fibrillation
C. Atrial Flutter
D. Junctional Rhythm
Answer: B
Conceptual Explanation: Atrial Fibrillation lacks organized P waves and has an irregularly
irregular ventricular response.
6. What is the standard PR interval range for a Normal Sinus Rhythm?
A. 0.10 to 0.25 seconds
B. 0.04 to 0.12 seconds
C. 0.12 to 0.20 seconds
D. 0.20 to 0.40 seconds
Answer: C
Conceptual Explanation: A normal PR interval reflects the time taken for electrical
impulse to travel from the SA node to the ventricles, normally 0.12-0.20 seconds.
