In paroxysmal supraventricular tachycardia (PSVT), the heart rate is typically around which value?

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Multiple Choice

In paroxysmal supraventricular tachycardia (PSVT), the heart rate is typically around which value?

Explanation:
PSVT produces a rapid, regular tachycardia driven by a reentrant circuit near the AV node. The ventricular rate tends to be around 150 beats per minute because the reentrant loop typically yields a cycle length close to 0.4 seconds per beat. This 150 bpm pace is a classic hallmark of a PSVT episode, helping distinguish it from normal resting rhythm (about 60 bpm) or faster, less typical rates for this specific arrhythmia. While some episodes can vary, around 150 bpm is the most characteristic value.

PSVT produces a rapid, regular tachycardia driven by a reentrant circuit near the AV node. The ventricular rate tends to be around 150 beats per minute because the reentrant loop typically yields a cycle length close to 0.4 seconds per beat. This 150 bpm pace is a classic hallmark of a PSVT episode, helping distinguish it from normal resting rhythm (about 60 bpm) or faster, less typical rates for this specific arrhythmia. While some episodes can vary, around 150 bpm is the most characteristic value.

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