atrioventricular node


Definition of atrioventricular node

: 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

First Known Use of atrioventricular node

1908, in the meaning defined above

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The first known use of atrioventricular node was in 1908

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Cite this Entry

“Atrioventricular node.” Dictionary, Merriam-Webster, Accessed 6 Mar. 2021.

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atrioventricular node


Medical Definition of atrioventricular node

: 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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