A Rare Case of Anomalous Origin of Left Anterior Descending Artery From Right Coronary Ostium.

Coronary artery anomalies are rare congenital malformations, most often undiagnosed until late adolescence or adulthood when an angiogram is done for conditions such as myocardial infarction, arrhythmias, heart failure, and sudden cardiac death. Sometimes, an anomalous left coronary artery originating from the right coronary ostium might traverse between the aorta and pulmonary artery and cause chest pain, syncope, myocardial infarction, or sudden death even in younger patients. Here we present a case of an elderly female presenting with chest discomfort on exertion. The coronary angiogram revealed severe triple vessel disease and an ectopic left anterior descending artery arising from the right coronary ostium. After careful evaluation, it was determined that her symptoms were solely due to severe multivessel coronary artery disease (CAD). Thus, she underwent coronary artery bypass surgery for her CAD. It is important to consider anomalous coronary artery as an important differential diagnosis in patients with angina, ventricular arrhythmias, or even sudden cardiac death, especially in the younger population.