MyMichigan Telemetry Monitoring And Management Practice Test

Which option best defines the Junctional rhythm rate?

30-50 bpm 50-70 bpm 40-60 bpm 60-80 bpm

Correct Answer:

40-60 bpm

Explanation:

Junctional rhythm comes from the AV node area when the SA node isn’t driving the heart. The AV node has a slower intrinsic rate, about 40–60 beats per minute, which is why this range defines a junctional rhythm. On an ECG, the P waves may be before, during, or after the QRS, and the QRS is usually narrow if ventricular conduction is intact. Among the options, 40–60 bpm matches the AV nodal pacing rate most closely, so it’s the best choice. The other ranges don’t fit the typical AV nodal pace: they imply either a slower ventricular escape rhythm or a rate closer to normal sinus rhythm, not the junctional pace.

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