, Relias Dysrhythmia Basic A Test – 2025/2026
Q&A | Nursing Exam
1. The nurse is assessing an ECG strip of a patient with a regular rhythm, heart
rate of 78 bpm, a P wave before each QRS, PR interval 0.14 seconds, and QRS
0.06 seconds. What rhythm is present?
A) Normal sinus rhythm
B) Sinus bradycardia
C) Sinus tachycardia
D) First-degree AV block
Correct Answer: Normal sinus rhythm
Rationale: Normal sinus rhythm has a rate of 60–100 bpm, regular rhythm, a P
wave before each QRS, a PR interval of 0.12–0.20 seconds, and a QRS less than
0.12 seconds. All these criteria match the description provided.
2. Which set of criteria is consistent with sinus bradycardia?
A) Rate 90 bpm, irregular rhythm, no P waves
B) Rate 50 bpm, regular rhythm, upright P waves, PR interval 0.16 sec
C) Rate 40-60 bpm, absent P waves, narrow QRS
D) Rate >100 bpm, regular rhythm, P waves present
Correct Answer: Rate 50 bpm, regular rhythm, upright P waves, PR interval 0.16
sec
Q&A | Nursing Exam
1. The nurse is assessing an ECG strip of a patient with a regular rhythm, heart
rate of 78 bpm, a P wave before each QRS, PR interval 0.14 seconds, and QRS
0.06 seconds. What rhythm is present?
A) Normal sinus rhythm
B) Sinus bradycardia
C) Sinus tachycardia
D) First-degree AV block
Correct Answer: Normal sinus rhythm
Rationale: Normal sinus rhythm has a rate of 60–100 bpm, regular rhythm, a P
wave before each QRS, a PR interval of 0.12–0.20 seconds, and a QRS less than
0.12 seconds. All these criteria match the description provided.
2. Which set of criteria is consistent with sinus bradycardia?
A) Rate 90 bpm, irregular rhythm, no P waves
B) Rate 50 bpm, regular rhythm, upright P waves, PR interval 0.16 sec
C) Rate 40-60 bpm, absent P waves, narrow QRS
D) Rate >100 bpm, regular rhythm, P waves present
Correct Answer: Rate 50 bpm, regular rhythm, upright P waves, PR interval 0.16
sec
