Bundle of His

**Definition:** Small band of specialized CARDIAC MUSCLE fibers that originates in the ATRIOVENTRICULAR NODE and extends into the membranous part of the interventricular septum. The bundle of His, consisting of the left and the right bundle branches, conducts the electrical impulses to the HEART VENTRICLES in generation of MYOCARDIAL CONTRACTION.

**Tree numbers:** - A07.541.409.273

**Synonyms:** - Atrioventricular Bundle - Kent-His Bundle