Detection of abnormal circumflex artery from the right coronary sinus in a patient scheduled for root aneurysm repair.

Around 5% of patients undergoing coronary angiography are diagnosed with a variant of aberrant coronary arteries. Malignant variants of this anomaly have been shown to result in 19% of sudden cardiac deaths in young athletes [1]. It is speculated that aberrant coronaries taking an anomalous course between the great arteries are squeezed between the pulmonary artery and the aorta during exercise or development of pulmonary hypertension. The most common anomaly diagnosed in adults is the ectopic right coronary artery from the left coronary sinus. A comparable anomaly with the circumflex artery from the right coronary sinus is among the most common variations and usually does not result in a dangerous entrapment of the coronary artery. However, during surgical interventions, these anomalous coronaries can result in significant complications. Especially, aortic valve opera-