Many of the primary congenital coronary anomalies are hemodynamically insig
nificant. Here we report one such anomaly - a rare one, Double Right Corona
ry Artery. A 52-year-old woman underwent Coronary Angiogram prior to Mitral
valve replacement. RCA injection showed filling of two separately originat
ing RCAs, coursing towards the right atrio-ventricular groove. The superior
RCA, after conus artery and 2 Right Ventricular branches, descended! beyon
d the acute margin of the heart and terminated as Posterior Descending Coro
nary Artery (PDA). The inferior RCA, after one small RV branch ended at the
crux, as PDA and a small Postero-lateral Branch. Both RCAs and the left co
ronary artery system were free of any disease. (C) 2001 Elsevier Science Ir
eland Ltd. All rights reserved.