扩张性心肌病是一种严重的心脏疾患,最初表现为左心室收缩功能异常,以后以左心功能衰竭为主。后期也可发展成右心衰竭、心律失常和血栓栓塞。成人病例约有60—75%在发病5年后死亡,其中半数可突然死亡.在左心功能严重衰竭的病人中其后果是严重的。与成人特发性扩张性心肌病比较,儿童的特发性扩张性心肌病报道较少(<20岁).Green, Dilated cardiomyopathy is a serious heart disease, initially manifested as left ventricular systolic dysfunction, after the main left heart failure. Late can also develop into right heart failure, arrhythmia and thromboembolism. Approximately 60-75% of adult cases die after 5 years of onset, and half of them can suddenly die, with serious consequences in patients with severe left ventricular failure. Children with idiopathic dilated cardiomyopathy have reported less (<20 years) compared with adult idiopathic dilated cardiomyopathy. Green,