Oki T, Sawada S, Matsumura K, Mori H
Jpn Circ J. 1975 Jun;39(6):657-64. doi: 10.1253/jcj.39.657.
Eight patients with isolated ventricular septal defect and two patients with tetralogy of Fallot were studied by UCG. Two of these patients showed notchings and five showed flutterings on F-A portions of the anterior mitral leaflet echoes. Fluttering seemed to be recorded more frequently in patients with right-to-left shunts such as cyanotic tetralogy of Fallot. It was considered that these functional changes of mitral valve echoes during diastole would be caused by the direction and amounts of blood flow across the defect and the velocity and amounts of blood flow through the mitral valve. Fluttering of mitral valve echo during diastole may be observed in normal subjects or in patients with other cardiac abnormalities, such as aortic insufficiency, atrial fibrillation or flutter. Flutterings seen in ventricular septal defect and tetralogy of Fallot are, however, of low amplitudes and of high frequencies, and are observed mainly between F and A points.
通过超声心动图（UCG）对8例单纯室间隔缺损患者和2例法洛四联症患者进行了研究。其中2例患者在前叶二尖瓣回声的F - A段显示有切迹，5例显示有扑动。扑动似乎在诸如发绀型法洛四联症这种有右向左分流的患者中更频繁地被记录到。据认为，舒张期二尖瓣回声的这些功能变化是由跨缺损的血流方向和量以及通过二尖瓣的血流速度和量所引起的。舒张期二尖瓣回声扑动在正常受试者或患有其他心脏异常（如主动脉瓣关闭不全、心房颤动或扑动）的患者中也可能观察到。然而，在室间隔缺损和法洛四联症中看到的扑动幅度低、频率高，并且主要在F点和A点之间观察到。
