So the sinus node waits the same interval but fires based on the ectopic beat.

接下来窦房结又等待了同样的间隔时间，该时间内传导的冲动是基于异位心搏发出的。

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.

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

In this case the wave of depolarization makes it into the atrium and depolarizes the atrium, including the sinus node, so essentially the sinus node resets about 4.4 boxes from the last, or 0.88 seconds.

在这种情况下，除极波进入心房并使其除极，包括窦房结，因此窦房结被重置，离上次大约4.4小格，或0.88秒。

Now both relax and come out of refractory, and exactly one second later, the sinus node sends another signal and the atrium contracts as it should, and then everything carries on as per usual.

现在心房心室均舒张、处于不应期之外，恰好一秒钟以后，窦房结发放了另一个冲动，心房按照既定收缩，然后一切按照正常进行。

Since the sinus node's going at 1 second per beat, and it's out of refractory, it fires off a signal and the atria contracts and you get another P wave, which is right on schedule.

由于窦房结以1秒/搏的速率工作，且处于不应期之外，它发放一个信号，心房收缩，你就看到了另一个P波，这完全在节律之中。