Also, you might have multiple ectopic foci PVCs, producing different appearing QRS complexes on a single rhythm strip.

同样，你可能有许多室性期前收缩的异位起搏点，在单一的心律带上产生了不同形式的QRS波群。

If this number is variable, count the number of QRS complexes on a 6 second strip and multiply by 10.

如果这个数字是可变的，则在6秒条带上计算QRS复合波的数量，然后乘以10。

Alright, as a quick recap - Premature ventricular contractions are abnormal heartbeats that originate in the ventricles, and show up as tall and wide QRS complexes on an ECG.

好，作一个小结：室性期前收缩是一种异常的心搏，起源于心室，在心电图上表现出高而宽的QRS波群。

The other category is complexed calcium, which is where the positively charged calcium is ionically linked to tiny negatively charged molecules like oxalate, which is a small anion that are normally found in our blood in small amounts.

另一小组是结合钙，带正电的钙离子共价结合至微小的带负电的离子上，例如草酸盐离子；草酸盐是体积较小的阴离子，通常少量存在于血液中。

Our analysis will include the following: For heart rate: Identify the QRS complex – usually the biggest on an ECG; count the number of small squares between two consecutive QRS complexes and calculate the heart rate with this formula.

心率：识别QRS波群，通常是心电图上最大的QRS波群；计算两个连续QRS波群之间的小方格数，并用公式计算心率。