<正>正常冠状动脉起源于左右冠状动脉窦,发出LAC(Left Coronary Artery)及RCA(Right Coronary Artery)两支,LAC从左冠状窦发出,RCA从右冠状窦发出。其中LAC又分出LAD(left anterior descending)及LCX(left circumflex branch)两支。冠状动脉起源异常(anomalous origin of coronary artery,AOCA)是一类先天性