This endocardium lines the heart chambers as well as the heart valves.

心内膜覆盖了心脏各腔室和瓣膜。

But what about the other bad beats, the premature contractions in the heart's lower chambers?

那么其它不良搏动，也就是心脏下室的早搏呢？

That is reassuring. But what about the other bad beats, the premature contractions in the heart's lower chambers?

这就让人放心了。那其他有害心跳，发生在心脏下腔的期前收缩(室性期前收缩)呢?

Between two of the heart's chambers.

有一个非常小的洞。

These are the heart chambers that receive blood returning to the heart.

它们是接收血液返回心脏的心腔。

These are the heart chambers that pump blood out of the heart.

它们是从心脏泵出血液的心腔。

You will also follow along as we trace the flow of blood through the heart chambers.

我们一起通过心腔的血液流动。

The arrhythmia was caused by a minor septal defect, which means there's a very small hole between two of the heart's chambers.

你心律不齐是由轻微的心房中隔缺损引起的，也就是说在你两个心室中间有一个小洞。

Your heartbeat is controlled by electrical signals that spread through the muscle cells that make up different heart chambers.

您的心跳由通过构成不同心腔的肌肉细胞传播的电信号控制。

The gene caused the creation of an exact copy of the sino-atrial node in the heart's upper right chamber.

该基因导致心脏右上腔室中窦房结的精确副本的产生。

It is also called broken-heart syndrome. The heart's main pumping chamber weakens and suffers a temporary disruption so that it cannot pump blood properly.

这种疾病也被称为“broken-heart syndrome”。心脏的主泵血腔减弱并遭受“暂时性的破坏”，因此无法正常泵血。

Everything from diet and lifestyle to age and physique can alter how cardiac tissue contracts in response to electrical signals, as well as how smoothly blood flows through the heart's chambers.

从饮食和生活方式到年龄和体质等一切都可以改变心脏组织响应电信号而收缩的方式，以及血液流过心腔的顺畅程度。

Poor oral care has been also linked to serious diseases such as heart disease, COPD, pneumonia, and endocarditis, which is an infection of the inner lining of your heart chambers or valves.

口腔护理不当还与心脏病、 慢性阻塞性肺病、 肺炎和心内膜炎等严重疾病有关，心内膜炎是心腔或瓣膜内壁的感染。