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A small nodular mass of specialized muscle fibers located in the interatrial septum near the opening of the coronary sinus. It gives rise to the atrioventricular bundle of the conduction system of the heart.
Entry Term(s)
A-V Node
AV Node
Atrio-Ventricular Node
Public MeSH Note
91; was see under HEART CONDUCTION SYSTEM 1975-90
Online Note
search HEART CONDUCTION SYSTEM 1966-74
History Note
91(75); was see under HEART CONDUCTION SYSTEM 1975-90
A small nodular mass of specialized muscle fibers located in the interatrial septum near the opening of the coronary sinus. It gives rise to the atrioventricular bundle of the conduction system of the heart.