森 一博¹, 土肥 嗣明¹, 鎌田 政博¹, 山本 裕子², 上田 稔³

Kazuhiro MORI¹, Tsuguaki DOHI¹, Masahiro KAMADA¹, Hiroko YAMAMOTO², Minoru UEDA³

¹岡山大学医学部小児科, ²水島三菱病院, ³心臓病センター榊原病院

¹The Department of Pediatrics, Okayama University School of Medicine, ²Mizushima Mitsubishi Hospital, ³Center for Cardiovascualar Disease, Sakakibara Hospital

キーワード : Jatene's operation, Straddling mitral valve, Cleft, Complete transposition of the great arteries

We present here our echocardiographic findings of two cases of complete transposition of the great arteries with straddling mitral valve before and after Jatene's operation.
The mitral valve had three leaflets with cleft, and the chordae of the anterior leaflet were attached to the anterior part of the right side of the ventricular septum in both cases.
After Jatene's operation, the patch of ventricular septal defect was deviated to the right ventricle wihout disturbing the movement of the mitral valve. Mitral regurgitation was detected in both cases, and one case with a ventricular septal defect of posterior extension showed tricuspid regurgitation by Doppler echocardiography. Left ventricular outflow tract obstruction caused by a straddling mitral valve was not observed.
Echocardiography is useful for evaluating this anomaly before and after Jatene's operation. Careful follow up is important to check for postoperative regurgitation of the atrioventricular valves.