Blood supply to AV node
Last updated: 06/03/2016
The atrioventricular node is supplied by the atrioventricular nodal artery, which most often is derived from the right coronary artery (right descending superior artery). It can also be supplied by Kugel’s artery, which is named after M.A. Kugel, who described it in 1927 as a long and wide artery that connects a proximal coronary artery to a posterior arterial branch. This vascular structure does not have a standard point of origin even in individuals in which it exists; it may originate from the proximal left circumflex artery or RCA, variously anastomosing to a posterior arterial branch (RCA, Cx) in the atrioventricular groove. If the AV node derives its blood supply from the RCA the individual is right-dominant; if from the LCx, the individual is left-dominant.
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