The small mass of modified cardiac muscle fibers located at the junction of the superior vena cava (VENA CAVA, SUPERIOR) and right atrium. Contraction impulses probably start in this node, spread over the atrium (HEART ATRIUM) and are then transmitted by the atrioventricular bundle (BUNDLE OF HIS) to the ventricle (HEART VENTRICLE).

DUI

D012849 MeSH Browser

CUI

M0019898

History note

78; was SINO-ATRIAL NODE 1964-77 (Prov 1964-69)

Online note

use SINOATRIAL NODE to search SINO-ATRIAL NODE 1966-77 (as Prov 1966-69)

Public note

78; was SINO-ATRIAL NODE 1970-77