The Doppler flow spectrum showed that the increase in the frequence and amplitude of positive flow spectrum could be important to the diagnosis of the congenital heart disease. 结论多普勒超声探测胎儿肝静脉血流频谱是完全可行的，其正向血流增高增多可为临床诊断胎儿某些先心病提供重要依据。
Conclusion Color Doppler echocardiography is very important in structural and hemodynamic study of RVOT reconstruction with valved BJVC in cyanotic congenital heart disease. 结论超声心动图在复杂紫绀先心病行牛颈静脉带瓣管道重建右心室流出道的结构及血流动力学变化中起着非常重要的作用。
