Ectopic beats can also have " triggered activity" which is where cells depolarize early.

异位心搏也有“激发活动”，即在细胞提前除极的位置。

And, to the degree that the heart's in-between, the heart will be depolarized and normal rhythm will, will be restored.

当心脏处于两者之间时，心脏会去极，常的心律。

Another type of atrial ectopic focus is a reentrant loop, which is when there's some tissue that doesn't depolarize right.

另一类房性异位起搏点是一个折返环路，主要发生在当某些组织不能确地除极的时候。

And this is how you could tell if the PVC depolarized the atrium or not.

你能由此区分室性期前收缩是否除极了心房。

For those whose compasses were not depolarized there seemed many odd things in these houses.

对于那些罗盘没有去极的人来说，些房子里似乎有很多奇怪的东西。

The cells of the SA node can depolarize on their own without any external influence.

SA结细胞可以自行去极而不受外界影响。

Lack of depolarizing flow through the dead segment results in a reduction of R wave activity.

坏死段去极电流缺失导致R波活性降低。

The left ventricle depolarizes NORMALLY toward V6, away from V1, producing a positive deflection in V6, negative in V1.

常情况下，左心室向V6导联去极，远离V1导联，V6导联产生，V1导联为负。

Normally, all my sites are depolarized at this time, and there is no electrical flow in the cardiac muscle.

常情况下，所有区域同时去极，心肌没有电流。

In bundle branch blocks, the UN-affected ventricle depolarizes first.

在束支传导阻滞中，未受影响的心室首先去极。

A shorter than normal PR interval, of less than 3 small squares, signifies that the ventricles depolarize too early.

PR间期短于常值，＜3个小方格，表明心室去极过早。

In a normal heart, the two ventricles are depolarized simultaneously by the two bundles and contract at the same time.

在常心脏中，两个束支同时使两个心室去极，两个心室同时收缩。

If we unpause this, then everything becomes depolarized, and since there's no difference in charge, now, there's no dipole, and so no deflection.

如果我们时将其“解冻”，那么所有细胞都被去极了，由于细胞外的电荷没有变，所以没有双极子，（心电图）上也就不存在任何波形（呈一条直线）。

One important effect of the premature depolarization is that the ectopic focus will depolarize the cells of the SA node, causing the SA node to skip a cycle.

过早除极的一个重要影响就是异位起搏点将会使窦房结细胞除极，导致窦房结跳过一个心动周期。

When the atria are full of blood, the SA node fires, electrical signals spread throughout the atria and cause them to depolarize.

心房充盈时，窦房结立即发出冲动，电信号会传遍整个心房并使其去极。

But eventually, the resting membrane potential gets so high that it's above the threshold potential, meaning that once the muscle depolarizes and contracts, it can't repolarize to allow another contraction.

但最终，静息电位变得太高，以至于超过阈值点位，意味着一旦肌肉去极收缩，就不能极以进行下一次收缩了。

In this case, after being depolarized, the sinus node waits its 1 second, and then sends another signal and again we carry on as normal.

在种情况下，窦房结在除极之后等待了1秒，然后发放另一个信号，心搏得以重新常进行。

That process started by depolarizing the cell — that is, pushing the cell's membrane potential from negative toward positive, past a threshold that triggered voltage-gated ion channels to open.

个过程是从细胞去极开始的——也就是说，将细胞膜电位从负极推高到极，超过了触发电压门控离子通道打开的阈值。

Now, if we measure out the interval between each SA node fire, we see that it should have fired here, but it doesn't because it was depolarized by the ectopic focus.

时，如果我们测量每一个窦房结冲动的间隔，我们可以看到它本应在此处发放，但并没有，因为它被异位起搏点除极了。

Remember that at rest, cells are negatively charged relative to the slightly positive outside environment and when they depolarize, the cells become positively charged, leaving a slightly negative charge in the outside environment.

要记住在静息状态下，细胞带负电，其外部环境则相对稍带电；当它们去极时，细胞带有电，它的外部环境带有负电。