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atrioventricular bundle

American  

noun

Anatomy.

  1. a bundle of specialized muscle fibers regulating the heartbeat by conducting impulses from the right atrium to the ventricles.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.