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atrioventricular node (AV node)
- a small node of modified cardiac muscle fibers located near the ostium of the coronary sinus; it gives rise to the atrioventricular bundle of the conduction system of the heart;
- loosely circumscribed conduction tissue with sparse pacemakerlike (P) cells in the atrioventricular junction.
Syn: nodus atrioventricularis, node of Aschoff and Tawara, Tawara node
WebMD Medical Reference from "Stedman's Medical Dictionary"
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Stedman’s Medical Dictionary 28th Edition, Copyright© 2006_Lippincott Williams & Wilkins. All rights reserved.
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