目的探讨早孕期双胎胎儿心脏畸形的产前超声诊断的临床价值。方法收集近四年来发现的7例双胎胎儿的单腔心畸形,并与引产及尸检病检对照。结果 7例首次检查时超声诊断为胎儿心脏畸形,均有NT增厚,再次超声检查时纠正诊断为单腔心畸形。结论超声是产前诊断双胎胎儿单腔心畸形的最早检查方法,再次超声检查明确畸形类型,并应用CDFI提高超声诊断的准确性。对早孕期双胎胎儿NT增厚者,更应注意心脏畸形,对临床及早处理或孕妇继续妊娠与否提供有效的帮助。 Objective To investigate the clinical value of prenatal ultrasound in the diagnosis of fetal twins in early pregnancy. Methods The single-chamber cardiac malformations of 7 twin fetuses found during the past four years were collected and compared with those of induced abortion and autopsy. Results The first sonographic examination of 7 cases was diagnosed as fetal cardiac malformations by first sonographic examination. All of them had NT thickening. When the sonographic examination was performed again, the single-chamber cardiac deformity was diagnosed. Conclusion Ultrasound is the earliest method of prenatal diagnosis of single fetus with single heart failure. Ultrasonography was used to confirm the type of deformity again. CDFI was used to improve the accuracy of ultrasonic diagnosis. On the twin twins in early pregnancy NT thickening, should pay more attention to cardiac malformations, early treatment of pregnant women or pregnant women continue to provide or not to provide effective help.