测定左心室功能是一种估计心脏疾病预后的重要指标。许多研究发现,用超声心动图测定的心脏喷血比数(EF)以及其它收缩功能与心血管造影的测定数值相一致。但也有人发现在心室节段性动作失调的冠心病人中,心功能的超声指标并不可靠。作者发现,正常人二尖瓣前叶舒张早期开放顶点(E点)常与室隔相接触,或与室隔靠近。而在心功能减退的病人中,二尖瓣E点—室隔间距 Determination of left ventricular function is an important indicator of prognosis of heart disease. Many studies have found that the echocardiographic cardiac ejection fraction (EF) and other contractile function consistent with the measured values ​​of cardiovascular angiography. However, it was also found in coronary heart disease in patients with segmental ventricular dysfunction, the heart function of the ultrasound index is not reliable. The authors found that normal early open mitral anterior leaflets (apex E) often contact with the septum or near the septum. In patients with impaired heart function, mitral E point - ventricular septum