The signals are then passed onto Purkinje fibers, turning upward and spreading throughout the ventricular myocardium.

然后这些信号被传递到浦肯野纤维上，向上旋转并扩散到整个心室心肌。

The electrical impulse moves through the Purkinje fibers very rapidly, and this impulse is what causes the ventricles to contract simultaneously.

电脉冲非常迅速地通过浦肯野纤维移动，这种脉冲导致心室同时收缩。

The effect is greatest in purkinje fibers as these are more sensitive to potassium levels as compared to the SA node increased.

浦肯野纤维的影响最大，因为它们对钾水平增加比SA结更敏感。

The impulse is now passed from the bundle branches to the terminal branches of the intrinsic conduction system known as the Purkinje fibers.

脉冲现在从束支传递到被称为浦肯野纤维的内在传导系统的末端分支。

Automaticity of the purkinje fibers may lead to the development of one or more ectopic pacemaker sites in the ventricles causing ventricular premature beats, tachycardia and fibrillation.

浦肯野纤维的自律性可能导致心室内一个或多个异位起搏点发展，导致室性早搏、心动过速和纤颤。

Now, the interesting thing is that in addition to the pacemaker cells in the SA node, cells in the AV node, Bundle of His, and the Purkinje fibers, all have the ability to generate an electrical potential.

好了，有趣的是除窦房结起搏细胞以外，房室结、希氏束以及浦肯野纤维中的细胞都有形成电势的能力。

Finally, the signal disperses out into Purkinje fibers, which trigger depolarization in all surrounding cells, causing the ventricles to contract from the bottom up like toothpaste tubes, at which point the whole cycle starts all over again.

最后，信号分散到浦肯野纤维中，触发周围所有细胞的去极化，导致心室像牙膏管一样自下而上收缩，此时整个循环重新开始。

It's then delayed just slightly as it goes through the atrioventricular or AV node, before it passes through the Bundle of His and to the Purkinje fibers of the left and right ventricles, causing them to contract as well.

之后，它在通过房室结时发生了短暂的延搁，而后通过房室束以及左右室的浦肯野纤维，使左右心室收缩。

These transient changes to the terminal portion of the QRS complex reflect worsening crisis in the oxygen-starved ventricular wall, and probably result from progressive ischemia and necrosis of the Purkinje fibers a tissue more resistant to death than working muscle.

QRS波群终末的这些短暂变化反映了缺氧心室壁的恶化危机，可能是由于进行性缺血和浦肯野纤维坏死所致，浦肯野纤维是一种比工作肌更耐死亡的组织。