Two dimensional image was obtained by transesophageal echocardiography.The thickness,wave time and velocity were showed during atrial septal motion by omni directional M mode echocardiography (OME).

• 应用经食管超声心动图获得二维图像,全方向M型超声显示并测量房间隔运动时的厚度、波幅时间及速度。