In theory, this helps the patient pinpoint ways to keep those apparently abnormal brain waves in check.

从理论上讲，这有助于患者精确地找到控制那些明显异常的脑电波的方法。

In unhealthy brains, on the other hand, we see abnormal brain waves, which suggests that the rhythms do something important; the question is, what?

另一方面，在不健康的大脑中，我们会看到异常的脑电波，这表明节律在做一些重要的事情；问题是，是什么呢？

Regardless of the originating ventricle, a premature ventricular contraction often has an abnormal T wave since the timing and direction of repolarization will be abnormal as well.

不论起源心室是哪个，室性期前收缩由于去极化的时程和方向也会异常，而经常有一个异常的T波。