atrioventricular node

noun

: a small mass of tissue in the right atrioventricular region of higher vertebrates through which impulses from the sinus node are passed to the ventricles

Examples of atrioventricular node in a Sentence

Recent Examples on the Web

This electrical signal flows down to another group of cells called the atrioventricular node (AV node) and down to the ventricles. —Christopher Lee, Verywell Health, 22 July 2024

Word History

First Known Use

1908, in the meaning defined above

Medical Definition

atrioventricular node

noun

: a small mass of tissue that is situated in the wall of the right atrium adjacent to the septum between the atria, passes impulses received from the sinoatrial node to the ventricles by way of the bundle of His, and in some pathological states replaces the sinoatrial node as pacemaker of the heart