Congenitally corrected transposition of the great arteries.
Congenitally corrected transposition of the great arteries (cTGA) is an uncommon cardiac malformation characterized by discordant atrioventricular and ventriculoarterial connections. Most cases of cTGA are associated with cardiac anomalies. As the ventricular outflow tract may appear to arise correctly from the right and left ventricles, cases of cTGA with a mild associated anomaly are rarely detected prenatally. Parallel vessels are evident in cTGA, but this sign is also present in complete TGA. We report a case of cTGA diagnosed in utero at 29 weeks' gestation. The fetus was diagnosed as TGA and referred to our hospital at 28 weeks' gestation. cTGA was found at 29 weeks' gestation in our hospital, and no additional cardiac anomalies were seen prenatally. After birth, patent ductus arteriosus with bidirectional flow was present. Careful examination of the four-chamber view suggested atrioventricular discordance. Identification of a parallel course of the great vessels, with the aorta anterior and to the left of the pulmonary trunk (l-transposition), may help accurate prenatal diagnosis of cTGA.
Department of Obstetrics and Gynecology, Keio University School of Medicine, Tokyo, Japan. kim-sh@kmh.gr.jp.|Department of Obstetrics and Gynecology, Kawasaki Municipal Hospital, 12-1 Shinkawadori, Kawasaki, Kanagawa, 210-0013, Japan. kim-sh@kmh.gr.jp.
Seon-Hye
SH
Kim
Department of Obstetrics and Gynecology, Keio University School of Medicine, Tokyo, Japan.
Mamoru
M
Tanaka
Department of Obstetrics and Gynecology, Keio University School of Medicine, Tokyo, Japan.
Momo
M
Umezu
Department of Obstetrics and Gynecology, Keio University School of Medicine, Tokyo, Japan.
Hideyuki
H
Oda
Department of Obstetrics and Gynecology, Kawasaki Municipal Hospital, 12-1 Shinkawadori, Kawasaki, Kanagawa, 210-0013, Japan.
Satoshi
S
Asai
Department of Obstetrics and Gynecology, Kawasaki Municipal Hospital, 12-1 Shinkawadori, Kawasaki, Kanagawa, 210-0013, Japan.
Takayuki
T
Higuchi
Department of Obstetrics and Gynecology, Keio University School of Medicine, Tokyo, Japan.
Ikuko
I
Kadohira
Department of Obstetrics and Gynecology, Keio University School of Medicine, Tokyo, Japan.
Kazuhiro
K
Minegishi
Department of Obstetrics and Gynecology, Keio University School of Medicine, Tokyo, Japan.
Kei
K
Miyakoshi
Department of Obstetrics and Gynecology, Keio University School of Medicine, Tokyo, Japan.
Yasunori
Y
Yoshimura
Congenitally corrected transposition of the great arteries; Fetal echocardiography; Prenatal diagnosis; l-Transposition