6Yoo SJ,Lee YH,Kim ES,et al.Three-vessel view of the fetal upper mediastinum:an easy means of detecting abnormalities of the ventricular outflow tracts and great arteries during obstetric screening[J].Ultrasound Obstet Gynecol,1997,9(3):173-182.
7Yagel S,Arbel R,Anteby EY,et al.The three vessels and trachea view(3VT)in fetal cardiac scanning[J].Ultrasound Obstet Gynecol,2002,20(4):340-345.
8Tegnander E,Eik-nes SH.The examiner’s ultrasound experience has a significant impact on the detection rate of congenital heart defects at the second-trimester fetal examination[J].Ultrasound Obstet Gynecol,2006,28(1):8-14.
9Turan S,Turan O M,Desai A,et al.First-trimester fetal cardiac examination using spatiotemporal image correlation,tomographic ultrasound and color Doppler imaging for the diagnosis of complex congenital heart disease in high-risk patients[J].Ultrasound in Obstet Gynecol,2014,44(5):562.
10Volpe P,De Robertis V,Campobasso G,et al.Diagnosis of congenital heart disease by early and second-trimester fetal echocardiography[J].J Ultrasound Med,2012,31(4):563.