Now once the ventricles have filled up, both of the atrioventricular valves snap shut, creating a long, loud sound that sounds a bit like " lub" .

现在一旦被血充满，所有的房瓣都关上了，发出一个长、响的声音，有点像“lub" 。

This type where it goes up from ventricle to atrium, is called Atrioventricular reentrant tachycardia (or AVRT) with orthodromic conduction, and can lead to very high ventricular rates, between 200 and 300 bpm.

这种电冲动从传导到房的类型，称为顺向传导的房折返性动过速（AVRT）；它可以导致很快的率，达到每分钟200-300次。

The impulses leap across synapse-like connections between the cells called gap junctions, and continue down the conduction system until they reach the atrioventricular node, or AV node, located just above the tricuspid valve.

这些脉冲越细胞之间称为间隙连接的突触状连接，并沿着传导系统继续前进，直到它们到达位于三尖瓣正上方的房结或房结。

The path the electrical impulse takes to the bottom of the heart is called the atrioventricular bundle, also known by the more rad name, the bundle of His, where it branches out to the left and right ventricles.

电脉冲到达脏底部的路径被称为房束，还有个更棒的名字——希斯氏束，它在那里分支到左和。

An atrioventricular or AV block is used to describe when the signal is delayed or blocked when it's trying to move from the atria to the ventricles.

房传导阻滞是指当电信号由房传导至时发生延误或阻滞。

Now, all that blood then goes through the first of two atrioventricular valves that separate the atria from the ventricles.

然后，所有血液首先经过三尖瓣，它是将房、分开的房瓣膜之一。

This so-called " group beating" can be differentiated from a type 1 second-degree atrioventricular heart block by identifying the abnormally shaped p-waves that are characteristic of an atrial ectopic focus.

所谓的“成组搏动”可以通过辨认房性异位起搏点产生的异常形状的P波与二度I型房传导阻滞相鉴别。

After entering the left atrium, the blood goes through the second atrioventricular valve called the mitral valve into the left ventricle.

进入左房后，血液穿过第二个房瓣膜，称为二尖瓣，进入左。

Now after both the aortic and pulmonary valves have shut down, the atrioventricular valves open again, letting the cycle start all over again.

当主动脉瓣和肺动脉瓣都关上后，房瓣再次打开，使动周期重新开始。

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，它在通过房结时发生了短暂的延搁，而后通过房束以及左的浦肯野纤维，使左收缩。

S1, caused by the atrioventricular valves closing, at the beginning of systole, and S2, caused by the aortic and pulmonary valves closing, at the beginning of diastole.

S1是由于房瓣的关闭导致的，发生在收缩早期；S2是由于主动脉瓣和肺动脉瓣的关闭导致的，发生在舒张早期。

In this form, the great arteries still connect to the wrong ventricle, but it's just that the ventricles are the one's that switch places along with their atrioventricular valves.

在这种构造中，大动脉仍然连接着错误的，只是和房瓣是一起交换位置的。