目的　探讨青年人Ⅰ -Ⅱ /6级收缩期心杂音产生的原因。方法　选择体检时心前区有Ⅰ -Ⅱ /6级收缩期杂音的青年人 60名 ,运用彩色多普勒超声心动图检测其心内结构及血流动力学改变。结果　受检者中心脏结构异常 7例 ,无明显异常 53例。结论　体检时发现心前区有Ⅰ -Ⅱ /6级收缩期杂音时 ,应及时做彩色多普勒超声心动图检查 ,以明确心脏杂音是否有病理意义 ,帮助临床医师判断体检是否合格。 Objective To investigate the causes of systolic heart murmur in young people Ⅰ-Ⅱ / 6. Methods Sixty young people with Ⅰ-Ⅱ / 6 systolic murmur in the precordial area were selected for examination. Their cardiac structures and hemodynamic changes were examined by color Doppler echocardiography. Results Subjects in the heart structure abnormalities in 7 cases, no significant abnormalities in 53 cases. Conclusion During the examination, I-Ⅱ / 6 systolic murmur was found in the precordial area. Color Doppler echocardiography should be done in time to find out whether the heart murmur has pathological significance and help the clinician to judge whether the medical examination is qualified.