Now, when the signal hits the AV node, it actually gets delayed for like, a tenth of a second — so the atria can finish contracting before the ventricles contract.

现在，当信号到达房室节点时，它实际上会延迟十分之一秒——所以心房可以在心室收缩之前完成收缩。

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。