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atrioventricular node



  1. 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;
  2. loosely circumscribed conduction tissue with sparse pacemakerlike (P) cells in the atrioventricular junction.

Synonym(s): nodus atrioventricularisTA, node of Aschoff and Tawara, Tawara node

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.