请阅读该段落,然后在该段落中找到符合给定定义的术语。 George was a 55-year-old obese man who was admitted to the emergency room with severe chest pains. The physician suspected a myocardial infarction and ordered an electrocardiogram (ECG). The results of the ECG showed ischemia to the myocardium. The patient did have atherosclerosis. There was no myocarditis suspected. The patient required cardiac bypass surgery to increase the vascular flow of the heart. Find the word that means: Method of recording the heart‘s action ( ) Heart muscle ( ) Inflammation of the heart muscle ( ) Pertaining to the blood vessels ( )