Percutaneous coronary intervention in a case of anomalous single coronary artery

Anomalous origin of the right coronary artery is an uncommon entity with a reported incidence of 0.26%. The anomalous origin is usually from the left sinus of Valsalva. Anomalous origin of the right coronary artery (RCA) from the left anterior descending (LAD) artery is a rare occurrence. Symptomatic patients with associated significant coronary artery disease (CAD) may be treated with routine interventions such as percutaneous coronary intervention or coronary artery bypass surgery. We report a case of single coronary artery with severe proximal LAD stenosis. The RCA had its origin from the mid LAD. Coronary intervention was successfully carried out on the severe stenosis at the proximal LAD artery. These cases are rare. We discuss accurate diagnosis and appropriate management in such cases.