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Bundle of His Division — FRCA Primary MCQ

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HardPhysiology - CardiovascularBundle of His DivisionFRCA Primary

In the normal cardiac conduction system, where does the His bundle bifurcate into the bundle branches?

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Correct answer: C — At the membranous interventricular septum after penetrating the fibrous skeleton

The best answer is “At the membranous interventricular septum after penetrating the fibrous skeleton”. The atrioventricular bundle passes from the AV node through the central fibrous body and then divides at the membranous interventricular septum into right and left bundle branches. The branches distribute through the ventricular conduction system; neither the SA node, coronary sinus nor ventricular apex is the normal bifurcation point.

Reference: Royal College of Anaesthetists, Primary FRCA Syllabus 2021: https://www.rcoa.ac.uk/sites/default/files/documents/2026-01/Primary-FRCA-Syllabus.pdf