Now - in both these situations, the QRS complex comes in early, which means an early ventricular contraction.

现在，在这两种情况下，QRS波群都会提前出现，意味着一次提前的心室收缩。

Also, you might have multiple ectopic foci PVCs, producing different appearing QRS complexes on a single rhythm strip.

同样，你可能有许多室性期前收缩的异位起搏点，在单一的心律带上产生了不同形式的QRS波群。

Pericardial effusions typically lead to low QRS voltages or electrical alternans, and can be seen on an echocardiograph.

心包积液常显示QRS低电压或电交替现象；超声心动图也可做出诊断。

Lead V6 sees the opposite, producing a wide, characteristic " bunny ears" QRS complex with two R waves.

V6导联则相反，产生一个宽的、特征性的“兔耳”QRS波群，两个R波。

The number of QRS complexes always equals the number of P waves MINUS one.

QRS波的数目总是等于P波数目-1。

In this example, there are four P waves for every three QRS complexes.

在这个例子中，每3个QRS复合波有4个P波。

This is known as a " blocked" P wave or a " dropped" QRS complex.

这就是所谓的P波“被阻滞”或QRS波群“脱落”。

First, if the AV node is receptive, it gets conducted down to the ventricles, resulting in a normal QRS complex.

首先，如果房室结接受它，它将向下传导到心室，形成一个正常的QRS波。

Also, the ST segment and T wave, which represent repolarization, will often be directed opposite the QRS complex.

同时，代表复极的ST段和T波通常与QRS主波方向相反。

In severe cases, it can also cause a prolonged PR interval, a diminished or absent P wave, and a widened QRS complex.

情况严重时，甚至可以出现PR间期延长、P波消失以及QRS复合波变宽。