Premature ventricular contractions are early beats that arise from the lower chambers of the heart.

性早搏是指从心脏下心产生的早搏。

Dr. Stevens, what are the primary causes of ventricular arrhythmias?

Stevens 医生，心律不齐的主要诱因是什么？

This part of the heartbeat, when blood is filling the relaxed ventricles is called diastole.

血液充满舒张的心的这个时期被称为舒张期。

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波群都会提前出现，意味着一次提前的心。

That's when the ventricles relax, to receive the next volume of blood from the atria.

这是心的时候，从心房接下一批血液发出的声音。

Blood on the right side therefore never gets oxygenated, and blood on the left side never gets deoxygenated.

从右心出来的血液不会被氧化，同样，从左心出来的血液不会去氧化。

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，它是将心房、心分开的房瓣膜之一。

The ventricles, meanwhile, are the discharging chambers that push the blood back out of the heart.

与此同时，心是排出血液的腔，将血液推回心脏。

And the stroke volume is a fraction of the total volume.

每搏输出量只是心总容积量的一小部分。

NSTEMI is infraction that is limited to the inner layer of the ventricular wall.

NSTEMI是局限于心壁内层的梗塞。

Fried eggs swimming in fat, served in a delightfully hollowed-out piece of white bread.

在一个挖空了的白面包里，我说话的这会儿都感觉到左心砰的一响。

Lodging into the wall of the right ventricle.

然后依附在右心的壁上。

The end-systolic volume is defined as the amount of blood remaining in the ventricles after contraction.

末期容积定义为后残留在心中的血液量。

It's propelled toward your lungs by the pumping action of the right ventricle of the heart.

它通过右心的泵送作用被推向肺。

This is the value that sits in between the chambers of the heart, the atrium and the ventricle.

这是位于心腔、心房和心之间的值。

Pulmonary vessels include the pulmonary artery and its branches, and the veins that drain the lung capillaries.

肺动脉携带来自于右心的低氧血液，而肺静脉将来自于肺的富氧血液运至左心房。

Because it'll equalize the pressure between the atria and the ventricle, and they need to be at different pressures.

因为它会平衡心房和心之间的压力，而且它们需要处于不同的压力下。

Now, lead V1 on an ECG measures a depolarization wave that moves towards the right ventricle.

好，心电图的导联V1测量向右心传导的除极波。

This is to say, the ventricles pump blood into the arteries regularly about 70 to 80 times a minute.

心产生的力形成一个上升的压力波，这一个波起始于心并沿动脉传播，称为脉搏。

It delays the passage of electrical impulses to the ventricles.

它延迟了电脉冲通过心的时间。