1.Results Color Doppler echocardiography showed that the embryocardia ductus arterious flow had a bright shunt from the pulmonary to descending aorta.

1.24%的胎心理性三尖瓣返,肺动脉阻普遍较高,胎心动脉导管血自肺动脉降主动脉,显色明亮。