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Meaning of atrioventricular bundle,

a'trioventric'ular bun'dle

Pronunciation: [key]
— Anat. Anat.
  1. a bundle of specialized muscle fibers regulating the heartbeat by conducting impulses from the right atrium to the ventricles. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.