ABSTRACT
Objective To explore the value of prenatal ultrasound,autopsy and vascular cast in diagnosis of right atrial isomerism(RAI).Methods Forty cases diagnosed as RAI by prenatal ultrasound from May 2012 to May 2017 were analyzed.And the results of autopsy and vascular cast after odinopoeia were compared,then up the characteristics of RAI were summed.The feature of venous drainage was the point.Results For all the 40 cases,the relative position of magenblase,the cross section of aortaventralis, the cross section of inferior vena cava and umbilical vein were lost"C"shape view.In intracardiac anomalies magenblase and cardiac apex on the different sides accounted for 77.5%,the atrioventricular septal defect accounted for 67.5%,the right ventricle double outlet accounted for 65.0%,and pulmonary artery stenosis accounted for 52.5%.The major finding of venous drainage were:bilateral superior vena cava accounted for 52.5%,left inferior vena cava accounted for 60.0%,abnormal hepatic venous drainage accounted for 20.0%,pulmonary vein co-antrum accounted for 45.0%.Three cases of cardiac malformation and 4 cases of abnormal pulmonary venous drainage were misdiagnosed,and 4 cases of abnormal hepatic venous drainage were missed by prenatal ultrasound.Conclusions RAI always combines distinctive cardiac malformations and abnormal venous drainage.Prenatal ultrasound has significant diagnostic value.It's important to have further understanding about RAI through the feedback of autopsy and vascular cast.