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

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'atrioventricular node.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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 31 Oct. 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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