Objective To evaluate the value of color Doppler in assessing cardiac function of recipient twin in twin-twin transfusion syndrome (TTTS) pregnancies. Methods This study included 17 TTTS pregnancies. Doppler studies of the umbilical artery, umbilical vein, ductus venosus. middle cerebral artery, atrioventricular valve and semilunar value were recorded in both fetus, and cardiothoracic ratio, heart rate, myocardial performance index of both ventricles were calculated. Results The estimated fetal weight, cardiothoracic ratio, myocardial performance index of right ventricle in recipient twins were significant higher than that of donor twin. The incidence of abnomal Doppler findings in umbilical vein, ductus venosus and tricuspid valve of recipient twin were all significantly higher than that of donor twin. There were two recipient twin manifesting right ventricular outflow tract obstruction in this study. Conclnsions Color Doppler imaging can be used to evaluate cardiac dysfunction in the recipient twin.%目的 探讨彩色多普勒超声在评价双胎输血综合征(TTTS)受血儿心功能中的价值.方法 选择TTTS 17例,孕龄为16,4～29.2周,平均(23.2±3.4)周.常规测量胎儿双顶径、头围、腹围及股骨长；系统扫查胎儿全身结构；测量胎儿脐动脉、脐静脉、静脉导管、大脑中动脉等血流参数；测量胎儿心胸面积比值及房室瓣、半月瓣的血流参数,计算心肌做功指数.结果 受血儿体质量、心胸面积比值、右心心肌做功指数均明显大于供血儿,差异有统计学意义(P＜0.05).受血儿脐静脉频谱异常、静脉导管频谱异常、三尖瓣舒张期血流频谱异常、三尖瓣反流均明显多于供血儿,差异有统计学意义(P＜0.05).受血儿中2例发生右室流出道梗阻,分别为Ⅲ级和Ⅳ级.结论 彩色多普勒超声可敏感反映TTTS受血儿心功能特别是舒张功能的异常,为判断病变的严重程度提供重要的临床信息.
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