临床上无杂音的轻度左侧心瓣膜反流可发生于一部分正常人．以往由超声心动图检测到的正常人心瓣膜反流发生率的资料，大多数来自于成年人，并且有研究提示其发生率随年龄增长而增高。该文对正常儿童和青少年左侧心瓣膜反流的发生率及特点进行研究． 方法应用多普勒超声心动图对 Clinically mild murmur left heart valve regurgitation can occur in some normal people. In the past, most of the data on the incidence of cardiac valve regurgitation detected by echocardiography in normal people came from adults. Some studies suggest that the incidence of heart valve reflux increases with age. This paper studies the incidence and characteristics of left heart valve regurgitation in normal children and adolescents. Methods Doppler echocardiography was used