Anatomy
atrioventricular node
[ ey-tree-oh-ven-trik-yuh-ler nohd ]
Subclass of:
Cardiac conduction system
Definitions related to atrioventricular node:
  • A small mass of specialized cardiac muscle fibers, located near the ostium of the coronary sinus and giving rise to the atrioventricular bundle of the conduction system of the heart.
    NCI
    U.S. National Cancer Institute, 2021
  • 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.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • Also known as the AV node. A major part of the electrical system in the heart that acts as a gateway between the atria and the ventricles. An electrical signal generated by the sinoatrial node (the heart's natural pacemaker) moves through the heart until it reaches the atrioventricular node, a cluster of cells at the bottom of the right atrium. The AV node delays the signal before it is passed to the ventricles. This lets the atria fully contract before the ventricles contract.
    Harvard Dictionary of Health Terms
    Harvard Medical Publishing, 2011
  • Small nodular mass of specialized muscle fibers located in the interatrial septum near the opening of the coronary sinus.
    CRISP Thesaurus
    National Institutes of Health, 2006
  • Subdivision of conducting system of heart which is located in the muscular part of the interatrial septum that is continuous with the atrioventricular bundle.
    Foundational Model of Anatomy
    University of Washington, 2017
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