Clinical Study Of New Method Screening For Fetal Heart Disease By Prenatal Echocardiography

Study background: fetal echocardiography has become a diagnostic method to detect fetal Congenital heart disease with high certainly. But it is not only time consuming and but also difficult to perform a detail echocardiography and visualize outflow tract view of fetus in the early of second trimester pregnancy for general obstetric ultrasonographer, even though in the second and third trimester pregnancy. Hence, it is critical to explore new method to screen for fetal congenital heart disease, which should be effective, convenient and suitable for the general obstetric ultrasonographers.Objective: The aim of this study was to investigate the clinical significance of nuchal translucency (NT), the ductus venosus flow waveform (DVFW) and the four-chamber view of heart (FCV) as well as combining the three markers to screen for fetal congenital heart disease in the early of second trimester pregnancy, and to assess the practicability of the four-chamber view with left and right ventricular outflow tract view(FCV+VOTV), the four-chamber view with short-axis view of great artery(FCV+SAV), the four-chamber view with three vessels and trachea view (FCV+3VT) screening for fetal cardiac malformation in the second and third trimester pregnancy.