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Right Bundle Branch of Atrioventricular Bundle
Nervous System

Right Bundle Branch of Atrioventricular Bundle

Crus dextrum fasciuli atrioventricularis

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Quick Facts

Origin: AV Bundle.

Course: Inferiorly along the right ventricular surface of the interventricular septum.

Branches: Right subendocardial branches (or Purkinje fibers).

Supply: Action potential to initiate contraction of the left ventricular myocardium.

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The right bundle (or branches) of the atrioventricular (AV) bundle originates in the interventricular septum, just inferior to the central fibrous body where the AV bundle splits into right and left branches.


The right bundle of the AV bundle runs down the wall of the interventricular septum towards the apex of the heart. It is found just deep to the endocardium lining the left ventricular surface of the septum. Upon reaching the apex, fibers will continue up superiorly along the lateral walls of the right ventricle.


There right bundle of the AV bundle terminates as subendocardial branches or Purkinje fibers that are distributed throughout the right ventricle. A significant number of branches travel across the right ventricle in the septomarginal trabecula moderator band (or moderator band), short-cutting their way to the papillary muscles.

Supplied Structures & Function

The right bundle of the AV bundle propagates the action potential passed to it from the AV bundle, transmitting it to the Purkinje fibers lining the inner surface of the right ventricular myocardium (Katz, 2010, Anderson et al., 2009).


Anderson, R. H., Yanni, J., Boyett, M. R., Chandler, N. J. and Dobrzynski, H. (2009) 'The anatomy of the cardiac conduction system', Clin Anat, 22(1), pp. 99-113.

Katz, A. M. (2010) Physiology of the Heart. M - Medicine Series: Wolters Kluwer Health/Lippincott Williams & Wilkins Health.

Learn more about this topic from other Elsevier products

Bundle of His

ScienceDirect image

The atrioventricular (AV) bundle (of His) is a collection of specialized muscle fibers beginning at the AV node and dividing into right and left bundles at the junction of the membranous and muscular parts of the interventricular septum.

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