Anomalous origin of right coronary artery originating from the proximal part of the left anterior descending artery via a collateral.

The incidence of anomalous coronary artery is approximatly 1% in patients who undergo coronary angiography. These anomalies, together with congenital heart disease, may cause myocardial ischemia, decreased life expectancy and sudden death. The case of a patient with a rare anomalous right coronary artery (RCA) from the very proximal part of the left anterior descending (LAD) artery via a collateral, aberrant vessel is described.