Ultrasonographic features of fetal right aortic arch in the first trimester
Zou Yanli1, Luan Wenjie2, Wang Shujuan3, Liu Yaqin1, Chu Guizhi1, Li Songyang1, Wang Haoling1, Zhang Jinting1, Jiang Xin1, Luan Zedong1.
1Department of Ultrasound, 3Department of Medicine, Laizhou Maternity and Child Healthcare Hospital, Laizhou 261400, China; 2Department of Ultrasound, Laizhou Chronic Disease Prevention and Treatment Hospital, Laizhou 261400, China
Abstract：ObjectiveTo explore the ultrasonographic features of fetal right aortic arch (RAA) in the first trimester. MethodsThe echocardiographic data of 12 fetuses with RAA in the first trimester who underwent standard fetal ultrasound examination and were confirmed by follow-up at Laizhou Maternal and Child Health Hospital from April 2019 to July 2022 were retrospectively analyzed, and the ultrasonic diagnostic characteristics of fetal RAA in the first trimester were summarized. ResultsTwelve instances of RAA were observed. Among these, 8 cases were isolated RAA, and 4 cases presented with other intracardiac and extracardiac abnormalities. Three cases underwent genetic testing, 2 cases of which resulted in normal results, and 1 case of which revealed a confirmed 22q11 microdeletion. By using three vessels and trachea (3VT) view, the aortic arch of the 12 cases was located to the right of the trachea, and the distance between the ductus arteriosus and the aortic arch of the 9 cases was widened. Nine cases combined RAA with U-shaped vascular rings created by the malformed left subclavian artery and the left ductus arteriosus. Three fetal RAA cases with mirror branches on the brachiocephalic arteries (1 case without ductus arteriosus, 1 case with left ductus arteriosus, and 1 case with right ductus arteriosus) did not develop vascular rings. Two cases revealed a single artery arch (the aortic arch), while 1 case revealed the right "V" sign by using 3VT view. Eleven cases showed increased angle between aortic arch and aortic ascendens in the left ventricular outflow tract (LVOT) view of non-standard. Eight of the 12 cases were confirmed by fetal echocardiogram in the second trimester and postnatal echocardiography, and 4 cases were confirmed by autopsy. ConclusionsFetal RAA has the characteristic ultasonographic appearances in the first trimester. It is of great significance to grasp the prenatal ultrasonographic features for the early detection and diagnosis of fetal RAA.
邹艳丽1栾文杰2王淑娟3刘亚琴1初桂芝1李松洋1王好玲1张锦婷1姜鑫1栾泽东1. 早孕期胎儿右位主动脉弓的产前超声
诊断学特征[J]. 中华诊断学电子杂志, 2023, 11(4): 227-232.
Zou Yanli1, Luan Wenjie2, Wang Shujuan3, Liu Yaqin1, Chu Guizhi1, Li Songyang1, Wang Haoling1, Zhang Jinting1, Jiang Xin1, Luan Zedong1.. Ultrasonographic features of fetal right aortic arch in the first trimester. zhzdx, 2023, 11(4): 227-232.
