A Case of a Single Coronary Artery Originating From the Right Coronary Sinus

A 69-year-old woman presented with a history of intermittent chest pain for 2 years. The pain was leftsided and did not radiate into the left arm. She had a history of hypertension, but had no other risk factors for coronary artery disease. Cardiac and lung auscultation were unremarkable. Electrocardiography revealed a normal sinus rhythm. Chest X-ray was normal. Transthoracic echocardiography demonstrated no cardiac abnormalities. The patient underwent coronary angiography for further evaluation. Angiography showed no vessels originating from the left coronary sinus (CS). The right coronary artery (RCA) originated from the right CS, the left anterior descending artery (LAD) originated from the proximal RCA (Fig. 1), and the left cricumflex artery (LCx) originated from the postero-lateral branch of the RCA (Fig. 2). The LAD had an anterior course and gave rise to the proximal-mid- and distal LAD (Fig. 3). Medical treatment with antihypertensive and vasodilating agents was recommended. Follow-up examination at 1 year demon Single Coronary Artery strated adequate resolution of angina. Coronary artery anomalies are rare. Of these, an isolated single coronary artery anomaly is the rarest one. 1)2) It’s are found incidentally during routine co