冠心病是以冠状动脉粥样硬化为基本病变继而引起冠脉管腔狭窄的缺血性心脏病,扩张型心肌病则是一类病因未明的心肌疾病.两者在临床表现上有许多雷同之处.临床准确诊断以及估计病程进展、采取合理有效的治疗手段对提高患者的生存率是十分重要的.本文对10例临床提示冠心病,而经左室及选择性冠状动脉造影证实为扩张型心肌病的患者,就其鉴别诊断要点进行临床分析. Coronary heart disease is the basic lesion of coronary atherosclerosis and then lead to coronary stenosis of ischemic heart disease, dilated cardiomyopathy is a class of unknown etiology of myocardial disease in both clinical manifestations there are many similar Department of clinical accurate diagnosis and estimation of course of progress, to take reasonable and effective treatment to improve patient survival rate is very important.This article on 10 cases of clinical manifestations of coronary heart disease, and confirmed by left ventricular and coronary angiography as dilatation Cardiomyopathy patients, the clinical diagnosis of its differential diagnosis points.