Bundle of His Division — FRCA Primary MCQ

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ModeratePhysiology - CardiovascularBundle of His DivisionFRCA Primary

Regarding the cardiac conduction system the bundle of His divides into the left and right bundle branches at which anatomical structure?

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Correct answer: C — Membranous interventricular septum

The bundle of His penetrates the central fibrous body and divides into left and right bundle branches at the upper part of the membranous interventricular septum. The right bundle branch is a single fascicle. The left bundle branch divides into anterior and posterior fascicles. The Purkinje network ramifies from the bundle branches to activate ventricular myocardium.

Reference: Power Kam 2018 Principles of Physiology for the Anaesthetist