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

Word History

First Known Use

1908, in the meaning defined above

Time Traveler
The first known use of atrioventricular node was in 1908

Dictionary Entries Near atrioventricular node

Cite this Entry

“Atrioventricular node.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/atrioventricular%20node. Accessed 28 Mar. 2024.

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

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