Difficulty: Medium
Average Score: 84%
Simulated
A nurse is analyzing a client's electrocardiogram (ECG) strip and identifies the following information: Heart rate: $92 / \mathrm{min}$, Rhythm: Irregular, P wave: Unable to identify, PR interval: Unable to measure, QRS duration: 0.10 seconds. Based upon this information, the nurse should interpret the client's rhythm as indicating which of the following?
Correct answer
A
Rationale
Atrial fibrillation is indicated by an irregular rhythm, absent P waves, and variable heart rate, matching the ECG findings. Sinus bradycardia has a regular rhythm and heart rate <60 bpm. Supraventricular tachycardia has a regular rhythm and rate >100 bpm. First-degree heart block has a prolonged PR interval and regular rhythm.