Which interval is the longest S1 S2 interval that fails to capture the ventricle?

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 $24.99Unlock all

Prepare for the RCES Exam with flashcards and multiple choice questions, each offering hints and detailed explanations. Ensure your success with a comprehensive study plan!

Multiple Choice

Which interval is the longest S1 S2 interval that fails to capture the ventricle?

Explanation:
In programmed stimulation, you test refractoriness by delivering a premature stimulus after a drive train (S1) and finding the longest S1S2 interval that fails to produce a ventricular depolarization. That interval defines the ventricular effective refractory period, VERP. It represents how long the ventricle remains unexcitable after the preceding beat; once the S2 interval is lengthened beyond VERP, the ventricle can capture and depolarize. The other terms refer to atrial refractory properties (AERP) or are not standard measures of ventricular capture in this context, so VERP is the appropriate choice for describing the longest S1S2 interval that fails to capture the ventricle.

In programmed stimulation, you test refractoriness by delivering a premature stimulus after a drive train (S1) and finding the longest S1S2 interval that fails to produce a ventricular depolarization. That interval defines the ventricular effective refractory period, VERP. It represents how long the ventricle remains unexcitable after the preceding beat; once the S2 interval is lengthened beyond VERP, the ventricle can capture and depolarize.

The other terms refer to atrial refractory properties (AERP) or are not standard measures of ventricular capture in this context, so VERP is the appropriate choice for describing the longest S1S2 interval that fails to capture the ventricle.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy