This type has a PR interval greater than 200 milliseconds.

这种传导阻滞的PR间期超过200毫秒。

People with WPW usually have a PR interval less than 120 ms, and a QRS complex greater than 110 ms.

WPW患者的PR间期常常小于120ms，QRS波大于110ms。

In severe cases, it can also cause a prolonged PR interval, a diminished or absent P wave, and a widened QRS complex.

情况严重时，甚至可以出现PR间期延长、P波消失以及QRS复合波变宽。

Type 1, called Mobitz 1 or sometimes Wenckebach, happens is when the PR interval gets progressively longer with each beat until a P-wave is blocked completely.

二度I型房室传导阻滞，又叫莫氏1型或者文氏阻滞，每次搏动PR间期逐渐延长，最终P波完全阻滞而不能下传。

The PR interval, however, remains CONSTANT in conducted beats.

然而，PR间期在传导节拍中保持不变。

What's different here from Mobitz I is that each time it does conduct, the PR interval stays the same, as opposed to getting progressively longer.

与莫氏I型不同的是，每次搏动时，PR间隔保持不变，而不会逐渐变长。

The PR interval is variable as there is NO relationship between the 2 rhythms.

PR间期是可变的，因为这两个节律之间没有关系。

Also, the closer the ectopic focus is to the AV node, the shorter the PR interval, which is the time from the P wave to the QRS complex.

并且，异位起搏点越靠近房室结，PR间期就越短，也就是P波到QRS复合波群的时间。

On an ECG, this is characterized by a longer PR interval of more than 5 small squares.

其心电图特征是PR间期较长，＞5个小方格。

When this happens measure the PR interval.

当这种情况发生时，测量PR间期。

On an electrocardiogram, the P-wave corresponds to atrial contraction, the PR interval corresponds to the slight delay through the AV node, and the QRS complex is ventricular contraction.

在心电图里，P波表示心房收缩，PR间期表示房室结的延搁，QRS波代表心室的收缩。

A consistent long PR interval of more than 5 small squares constitutes first-degree heart block.

持续长PR间期＞5个小方格构成I度心脏传导阻滞。

On an ECG, this is seen as PROGRESSIVE prolongation of PR interval followed by a P wave WITHOUT a QRS complex.

在心电图上，可见PR间期渐进性延长，随后是P波，无QRS复合波。

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。

If the PR interval is more than 3 small squares, the origin of the rhythm is within the atria- ectopic atrial rhythm.

如果PR间期＞3个小方格，则心律起源于心房-异位房性心律。

So maybe the first PR interval is 200 ms, then the next is 260 ms, then 300 ms, and finally the next one doesn't make it to the ventricles, and you get what's called a " dropped beat" .

因此可能第一个PR间期为200毫秒，下一个260毫秒，再下一个300毫秒，最后出现一个P波无法下传至心室，这就是所谓的“心搏脱落”。

Second degree AV block–Type 2, or Mobitz II, is similar to type 1 AV block in that you get intermittent dropped beats, except this time they happen fairly randomly, so you don't have this progressive lengthening of the PR interval.

二度II型房室传导阻滞，又叫莫氏II型，与二度I型房室传导阻滞相似，患者也会出现心搏脱落，只是这一型患者心搏脱落的出现较为随机，在心电图上无法观察到逐渐延长的PR间期。

In experimental models, ECG changes produced by hyperkalemia follow a typical pattern that correlates with serum potassium levels: peaked T-wave, P wave widens and flattens, PR interval lengthens, QRS complex widens and eventually blends with T-wave.

在实验模型中，高钾血症引起的ECG改变遵循与血清钾水平相关的典型模式：T波峰值、P波变宽变平、PR间期延长、QRS复合波变宽并最终与T波融合。