目的　探讨胎心三尖瓣返流的原因与临床价值。方法　应用彩色多普勒血流显像对 2 1例胎心三尖瓣返流进行了检测 ,观察胎心结构、返流信号分布、测量最大返流速度。结果　 2 1例胎心三尖瓣返流的原因为 :先心病组 6例 ,均显示心内结构异常 ;非先心病组 15例 ,4例表现右心扩大 ,无心内结构畸形 ;两组返流速度无显著差异 (P >0 .0 5 )。结论　先心病引导的三尖瓣返流是因心脏结构异常所致 ,非先心病性三尖瓣返流主要由于胎心右室功能不良引起。当检出三尖瓣返流时 ,应进一步追踪扫查心内结构有无畸形 ,在排除先心病之后即应提示心脏负荷增加 ,若伴有右心腔扩大则是发生心力衰竭的佐证 Objective To investigate the causes and clinical value of fetal tricuspid regurgitation. Methods Color Doppler flow imaging was used to detect the tricuspid regurgitation in 21 cases. The fetal heart structure and the signal distribution of regurgitation were observed and the maximum regurgitation velocity was measured. Results 21 cases of fetal heart tricuspid regurgitation due to: 6 cases of congenital heart disease, all showed structural abnormalities in the heart; non-congenital heart disease in 15 cases, 4 cases showed right ventricular enlargement, no cardiac structural deformity; There was no significant difference in flow velocity (P> 0.05). Conclusion Congenital heart disease-induced tricuspid regurgitation is caused by an abnormal cardiac structure. Non-congenital tricuspid regurgitation is mainly caused by dysfunction of fetal right ventricle. When the detection of tricuspid regurgitation, should further track the structure of the heart to check for deformity in the exclusion of congenital heart disease should be prompted to increase the load, if accompanied by the expansion of the right heart chamber is the evidence of heart failure