Intra-atrial course of the right coronary artery and its branches.

Abstract

The genesis of this epicardial coronary anomaly is unclear, but may relate to the 'higher' than normal course of the artery in these cases, in concert with the normal thinness of the right atrial wall, and the tendency for even medium calibre arteries to assume this subendocardial location. Despite the benign outcome of the index cases described here, the authors believe that this intracavitary course of the RCA could pose special technical problems during coronary artery catheterization and bypass grafting.