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Glossary of Terms

Atrioventricular (AV) Node
Also known as the Aschoff-Tawara node, the AV node is a group of specialized cardiac muscle fibers located at the center of the heart, in the floor of the right atrium, between the atria and ventricles. The AV Node takes the signal from the Sinoatrial (SA) Node, slows the signal down and regulates it, and then sends the electrical impulses from the atria to the ventricles (bundle of His). The AV node regulates the signals to the ventricles to prevent rapid conduction (atrial fibrillation), as well as making sure that the atria are empty and closed before stimulating the ventricles.

Related terms: Atrial Fibrillation, SA Node, Natural Pacemaker


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