目的探讨心底短轴切片面主动脉内可见左冠状动脉窦外侧壁指向左下方以蓝色为主花色血流束。方法主动脉、肺动脉隔无缺损,超声诊断:主动脉内异常血流。结果经冠状动脉造影诊断为:左冠状动脉分支肺动脉瘘。结论冠状动脉瘘是一种少见的先天性心脏病,诊断时要在除外冠状窦瘤破裂,动脉导管未闭。 Objective To investigate the inner wall of the left atrium of the left coronary artery in the short axis of the heart. Methods aorta, pulmonary artery no defect, ultrasonic diagnosis: aortic abnormal blood flow. Results Coronary angiography was diagnosed as pulmonary artery fistula of the left coronary artery. Conclusion Coronary fistula is a rare congenital heart disease, except in the diagnosis of coronary sinus aneurysm rupture, patent ductus arteriosus.