The pattern 'Longer, longer, drop' describes which second-degree block type?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $25.99Unlock all

Prepare for the MyMichigan Telemetry Monitoring and Management Test. Utilize flashcards, multiple choice questions, each with hints and explanations. Master your exam!

Multiple Choice

The pattern 'Longer, longer, drop' describes which second-degree block type?

Explanation:
Longer, longer, drop is the classic description of Mobitz type I, a second-degree AV block also called Wenckebach. In this pattern the PR interval keeps getting longer from one beat to the next until a P wave is not followed by a QRS complex—a dropped beat. After that, the cycle starts again with a shorter PR interval. This reflects progressively delaying conduction through the AV node, and it can occur with conditions or drugs that slow AV nodal conduction. Why this fits best: the defining feature is the gradual PR prolongation culminating in a dropped beat, which sets Mobitz type I apart from the other patterns. For contrast, Mobitz type II shows occasional dropped QRS without PR lengthening; first-degree block has a consistently prolonged PR with every P conducted; and third-degree block has complete AV dissociation with no fixed relationship between P waves and QRS.

Longer, longer, drop is the classic description of Mobitz type I, a second-degree AV block also called Wenckebach. In this pattern the PR interval keeps getting longer from one beat to the next until a P wave is not followed by a QRS complex—a dropped beat. After that, the cycle starts again with a shorter PR interval. This reflects progressively delaying conduction through the AV node, and it can occur with conditions or drugs that slow AV nodal conduction.

Why this fits best: the defining feature is the gradual PR prolongation culminating in a dropped beat, which sets Mobitz type I apart from the other patterns. For contrast, Mobitz type II shows occasional dropped QRS without PR lengthening; first-degree block has a consistently prolonged PR with every P conducted; and third-degree block has complete AV dissociation with no fixed relationship between P waves and QRS.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy