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

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，心脏会去极化，恢复正常的心律。

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

另一类位起搏点是一个折返环路，主要发生在当某些组织不能正确地除极的时候。

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

你能由此区分室期前收缩是否除极了心。

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化的人来说，些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化而不受外界影响。

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

坏死段去极化电流缺失致R波活降低。

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

正常情况下，左心室V6去极化，远离V1，V6产生正偏斜，V1为负偏斜。

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

正常情况下，所有区域同时去极化，心肌没有电流。

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

在束支传阻滞中，未受影响的心室首先去极化。

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

PR间期短于正常值，＜3个小方格，表明心室去极化过早。

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

在正常心脏中，两个束支同时使两个心室去极化，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化了，由于细胞外的电荷没有变化，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位起搏点将会使窦结细胞除极，致窦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.

心充盈时，窦结立即发出冲动，电信号会传遍整个心并使其去极化。

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化收缩，就不能复极化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，心搏得以重新正常进行。

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化开始的——也就是说，将细胞膜电位从负极推高到正极，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，因为它被位起搏点除极化了。

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正电；当它们去极化时，细胞带有正电，它的外部环境带有负电。