心杂音是先心病的重要体征,在先心病的诊断中有很大的价值。有的非紫绀型先心病,根据心杂音的部位、时相、性质、强度及传导方向等,结合其他有关体征,如震颤、心音、喀喇音、末梢血管征等,即可作出比较可靠的诊断,如动脉导管未闭、房间隔缺损、室间隔缺损、肺动脉瓣狭窄、主动肺瓣狭窄等。但在一些正常小儿甚至青少年,亦可有“无害性杂音(Innocent murmurs)”。此种杂音常位于肺动脉瓣区或心尖区,呈收缩早期,强度Ⅰ～Ⅱ/Ⅵ级,性质柔和或呈乐音样,较局限,不伴有震颤。常在卧位 Heart murmur is an important sign of congenital heart disease, in the diagnosis of congenital heart disease have great value. Some non-cyanotic congenital heart disease, heart murmur according to the location, timing, nature, intensity and conduction direction, combined with other relevant signs, such as tremor, heart sounds, Kara tone, peripheral vascular signs, you can make more reliable Diagnosis, such as patent ductus arteriosus, atrial septal defect, ventricular septal defect, pulmonary valve stenosis, aortic valve stenosis and so on. But in some normal children and even adolescents, there may be “innocent murmurs.” Such noise is often located in the pulmonary valve area or apex area, was early contraction, intensity Ⅰ ~ Ⅱ / Ⅵ level, soft or music-like nature, more limited, without tremor. Often in the supine position