Wenckebach is another term for which second-degree block pattern?

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Multiple Choice

Wenckebach is another term for which second-degree block pattern?

Explanation:
Wenckebach is the Mobitz type I second-degree AV block. The defining pattern is a gradually lengthening PR interval on consecutive beats, followed by a non-conducted P wave (a dropped QRS), after which the cycle starts over. This occurs due to a delay within the AV node itself. So, you’ll see P waves at a regular rate, but the time from each P to the next QRS gets longer until a beat is skipped. That progression and reset are the hallmark of this pattern, distinguishing it from other blocks: first-degree AV block has a consistently prolonged PR without dropped beats; second-degree type II has intermittent dropped beats without prior PR prolongation; and third-degree block shows complete AV dissociation with no fixed relationship between P waves and QRS. Wenckebach specifically points to the second-degree AV block type I pattern.

Wenckebach is the Mobitz type I second-degree AV block. The defining pattern is a gradually lengthening PR interval on consecutive beats, followed by a non-conducted P wave (a dropped QRS), after which the cycle starts over. This occurs due to a delay within the AV node itself.

So, you’ll see P waves at a regular rate, but the time from each P to the next QRS gets longer until a beat is skipped. That progression and reset are the hallmark of this pattern, distinguishing it from other blocks: first-degree AV block has a consistently prolonged PR without dropped beats; second-degree type II has intermittent dropped beats without prior PR prolongation; and third-degree block shows complete AV dissociation with no fixed relationship between P waves and QRS. Wenckebach specifically points to the second-degree AV block type I pattern.

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