In this situation, the depolarization wave conducts down the left bundle branch and then through the ventricles aberrantly, resulting in an abnormally wide QRS complex.

在这种情况下，除极波向下传导到左束支，然后异常地穿过心室，导致个异常增宽的QRS波群。

So if we get a more zoomed out look at the ECG, some of these P waves have a QRS complex right after them, and some don't and are followed by escape beats.

因此当我们对心电图整体观察的话，P波后现QRS波群，没有，并可现逸搏。

Alright, as a quick recap - Premature ventricular contractions are abnormal heartbeats that originate in the ventricles, and show up as tall and wide QRS complexes on an ECG.

好，个小结：室性期前收缩是种异常的心搏，起源于心室，在心电图上表现高宽的QRS波群。

The ventricular contraction is seen as a QRS complex, and the ventricular repolarization, and therefore it's relaxation, is seen as a T-wave.

心室收缩以QRS复合波群的形式展现，心室复极以及因此发生舒张的波形，则视为T波。

As an example, consider how the 6 chest leads - V1 through V6 - register this depolarization wave form called the QRS complex.

为例子，我们来看下这6个胸导联，V1-V6是怎样来记录被称为“QRS波群”的除极波形的。

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波群都会提前现，意味着次提前的心室收缩。

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，在单的心律带上产生了不同形式的QRS波群。

Also, the closer the ectopic focus is to the AV node, the shorter the PR interval, which is the time from the P wave to the QRS complex.

并且，异位起搏点越靠近房室结，PR间期就越短，也就是P波到QRS复合波群的时间。

The QRS wave, which is sometimes called the QRS complex, represents the spread of the electrical impulse through the ventricles, or ventricular depolarization.

QRS波，有时被称为QRS波群，代表电脉冲通过心室的传播，或心室去极化。

If the ectopic focus originates in the left ventricle, the wave will depolarizing the left ventricle first and then the right ventricle, which produces a QRS complex that looks like a right bundle branch block.

如果异位起搏点源于左心室，这个波将会首先除极左心室，然后是右心室，这会产生类似于右束支阻滞的个QRS波群。

Thus, the QRS complex starts as predominantly negative in V1, and ends as predominantly positive in V6.

因此，QRS波群在V1开始时主要为负，在V6时以正性结束。

Peaked T-waves, ST segment elevation, and alterations to the terminal portion of the QRS complex are the early changes of acute myocardial infarction secondary to complete occlusion of a coronary arterial vessel.

T波尖峰，ST 段抬高，以及QRS波群终末部分改变，均是继发于冠状动脉完全堵塞后的急性心肌梗死的早期改变。

If the ectopic focus originates in the right ventricle, the wave will depolarize the right ventricle first and then the left ventricle, and this produces a QRS complex that looks like a left bundle branch block.

如果异位起搏点源于右心室，这个波将会首先除极右心室，然后是左心室，这会产生类似于左束支阻滞的个QRS波群。

As this usually repeats in regular cycles, there is a fixed ratio between the number of P waves and the number of QRS complexes per cycle.

由于它以规则周期重复，因此，每个周期P波和QRS波群数量之间有个固定的比率。

On an ECG V-tach is characterized by wide and bizarre looking QRS complexes.

在ECG上，V-tach的特征是宽异常的QRS波群。

In a given ECG lead, T waves are generally concordant with the QRS complex so that in a lead with a dominant R wave such as v6 the T waves are normally upright.

在给定的心电图导联中，T波通常与QRS波群致，因此在具有主导R波或v6波的导联中，T波通常是直立的。

The line on an ECG connecting readout, connecting the end of the QRS complex and the T wave is called the ST segment.

心电图上连接读器、QRS波群末端和T波的线称为ST段。

Negative values of the QRS complex in both leads are indicative of extreme axis deviation.

两个导联的QRS波群均为负值，表明存在极端轴偏移。

This is followed by elevation of the ST segments above the eyes of electric line in these leads and this in turn is followed by alterations to the terminal portion of the QRS complex.

随后，这导联中的ST段抬高至电线上，QRS波群末端改变。

In this example, there are three P waves for every QRS complex and the condition is described as " 3 to 1" heart block.

此时，每个QRS波群有3个P波，这种情况为“3： 1”心脏传导阻滞。