M型超声心动图诊断房间隔缺损有赖于右心室增大以及空间隔的矛盾性运动。然而,在任何右室容量负荷过度,均可有右心室增大及室间隔矛盾性运动。所以,这一表现属非特异性。晚近发展的切面超声心动图加强了记录心脏动态空间图形的能力,可在大多数正常人和房间隔缺损的病人直接显示房间隔。在房间隔完整者,常可见到一条连续的线状回声带,从主动脉的下内缘延伸至心房共同后壁。而房间隔缺损病人则在病变部位显示回声局部失落。然而,在正常人或其他心房间隔完整的心脏病患者,有时亦可在其中部出现回声失落。由于其假阳性率颇高,从而影响了切面超声心动图在房间隔缺损中的诊断价值。本文研究在周围静脉注射心兰 M-mode echocardiography diagnosis of atrial septal defect depends on the contralateral ventricular septal enlargement and contradictive movement. However, any right ventricular volume overload may have contradictory right ventricular and ventricular septal movements. So, this performance is non-specific. Recent developments in echocardiography enhance the ability to record dynamic spatial patterns of the heart and display atrial septum directly in most normal subjects and patients with atrial septal defects. Atrial septal integrity, often can see a continuous linear echo, extending from the lower edge of the aorta to the atrial common posterior wall. The atrial septal defect patients showed lesions in the local echo partial loss. However, in normal people or other patients with atrial septal complete heart disease, echocardiography may sometimes occur in the middle of them. Because of its high false positive rate, which affected the section echocardiography in the diagnosis of atrial septal defect. This article studies in the surrounding intravenous injection of orchid