目的探讨产前超声对胎儿主动脉弓离断的产前诊断价值。方法回顾性分析经外科手术或经上级医院证实的9例胎儿主动脉弓离断的产前心脏超声表现。结果 9例符合诊断的产前胎儿超声心动图表现为四腔心切面不对称,左心室较右心室小。主动脉内径较肺动脉明显小,升主动脉直行。升主动脉与降主动脉的连接关系不能显示,只能显示动脉导管弓切面,在三血管-气管平面显示升主动脉或主动脉弓与降主动脉间连续中断。结论胎儿主动脉弓离断具有特征性超声表现,不合并其他复杂畸形时多数预后良好,仔细的产前超声检查有助于早期发现病变并给予适当的遗传咨询。 Objective To investigate the value of prenatal ultrasound in prenatal diagnosis of fetal aortic arch. Methods The prenatal cardiac ultrasound findings of 9 cases of fetal aortic arch fractures confirmed by surgery or the superior hospital were retrospectively analyzed. Results Nine cases of prenatal fetal echocardiography were diagnosed as having asymmetric four-chamber coronal sections and a smaller left ventricle than the right ventricle. Aortic diameter was significantly smaller than the pulmonary artery, ascending aorta straight. The connection between the ascending aorta and the descending aorta can not be displayed, but only shows the ductus arteriosus, which shows continuous interruption of the ascending aorta or the aortic arch and the descending aorta in the three-vessel-tracheal plane. Conclusions Fetal aortic arch fractures have characteristic ultrasonographic manifestations. Most of them have a good prognosis without complicated other deformities. Careful prenatal ultrasonography can help detect early lesions and give appropriate genetic counseling.