What mechanism is AVRT?

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 Electrophysiology Unit (EPU) 26.19 exam with our interactive quiz featuring flashcards and multiple choice questions. Check your understanding with hints and explanations for each question.

Multiple Choice

What mechanism is AVRT?

Explanation:
Macroreentry describes a large reentrant circuit that travels around a substantial pathway, such as the AV ring, using the AV node-His-Purkinje axis as one limb and an accessory pathway as the other. In AVRT, the loop spans a broad region because the atrial tissue and ventricular tissue are connected by the accessory pathway, creating a circuit that travels around the AV ring rather than being confined to a tiny area. Microreentry would involve a very small rotor within scar or a confined focus, which is not how AVRT operates. Therefore, the mechanism is macroreentrant.

Macroreentry describes a large reentrant circuit that travels around a substantial pathway, such as the AV ring, using the AV node-His-Purkinje axis as one limb and an accessory pathway as the other. In AVRT, the loop spans a broad region because the atrial tissue and ventricular tissue are connected by the accessory pathway, creating a circuit that travels around the AV ring rather than being confined to a tiny area. Microreentry would involve a very small rotor within scar or a confined focus, which is not how AVRT operates. Therefore, the mechanism is macroreentrant.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy