The epicardial electrogram was used to measure the myocardial ischemia degree.是什么意思？

The epicardial electrogram was used to measure the myocardial ischemia degree.

描记心外膜电图,计算心肌缺血程度.

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

electrogram

n. 电描记图；

例句
The epicardial electrogram was used to measure the myocardial ischemia degree.
描记心外膜电图,计算心肌缺血程度.

was

v. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质（ be的过去式 ），在，存在，不受干扰；

例句
There was a terrible sadness in her eyes...
她眼神中流露出深深的悲伤。

used

adj. 用过的，习惯于，二手的，旧的；v. 使用（ use的过去式和过去分词），常常，经常；

例句
The gym can be used by both able-bodied and disabled people.
这家健身房健全和残障人士都可使用。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

measure

n. 测量，测度，措施，程度，尺寸；vt. 测量，估量；vi. 测量，测量（大小，容量，尺寸等）；

例句
...an inflation measure that gauges the price of a fixed basket of goods and services.
通过衡量固定的一组商品和服务的价格来测算通货膨胀的方法

Myocardial

adj. 心肌的；

例句
Acute myocardial infarction ( AMI ) is one of the most common cardiovascular emergencies.
急性心肌梗死 ( AMI ) 是人类最常见的心血管急症之一.

ischemia

n. 缺血；

例句
And in ischemia 12 h the activity of alanine aminotransferase ( ALT ) and aspartate aminotransferase ( AST ) were also increased significantly.
以血清谷丙转氨酶(alanine aminotransferase,ALT ) 与谷草转氨酶 ( aspartateaminotransferase,AST ) 活性反映肝损伤情况.

degree

n. [乐]音阶，度，[数]度，度数，程度，学位；

例句
This degree programme is fully accredited by the Institution of Electrical Engineers.
这门学位课程经电气工程师学院鉴定完全合格。