The ST segments in all leads are expected to lie on the isoelectric line.

所有导联的ST段均应位于等位线上。

However, the classical ECG abnormalities associated with ischemia are depression of the ST segment below the isoelectric line.

然而，与缺血相关的典型心电图异常是ST段在等电线以下的压低。

In the minutes following a hyperacute T wave changes, the ST segments in leads overlying the myocardial region deprived of arterial blood supply begin to rise above the isoelectric line.

超急性T波改变后的几分钟内，心肌缺血区的导联ST段开始高于等位线。