Anomalous origin of right coronary artery from the pulmonary artery: an incidental finding on cardiac computed tomography in a patient presenting with dyspnea

Anomalous right coronary artery originating from the pulmonary artery (ARCAPA) is rare with an incidence of 0.002%. It usually presents in adulthood with symptoms of angina and is often associated with other congenital anomalies. We report a case of ARCAPA, that was diagnosed on investigation of dyspnea on exertion.