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Trunk of atrioventricular bundle

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trunk of atrioventricular bundle

The singular initial portion (stem) of the atrioventricular bundle which passes from the atrioventricular node into the right trigone of the fibrous skeleton of the heart and along the periphery of the membranous interventricular septum; upon reaching the muscular interventricular septum, the trunk terminates by dividing into the right and left crura of the atrioventricular bundle.

Synonym: truncus fascicularis atrioventricularis.