所有病人二维超声心动图显示三尖瓣区无瓣叶活动，CDFI显示右房室连接处无血流信号。
Echocardiography in all patients showed tricuspid area without movement of the leaflets, no CDFI signal over the right atrioventricular junction.
结果右房室瓣瓣叶分为粗糙区、透明区、基底区。
Results The right atrioventricular valve can be divided into rough region, transparent region and basin region.
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