It has been many years to diagnose acute myocardial infarction (AMI) by evaluating the activity of serum enzymes such as asartate aminotransferase (AST), lactate dehydrogenase (LD), creatine kinase (CK) and their isoenzymes.

• 根据血清中有关酶 (如 :天门冬氨酸氨基转移酶 (AST)、乳酸脱氢酶 (LD)、肌酸激酶及其同工酶 (CK MB) )活性的变化来诊断急性心肌梗塞 (AMI)已有多年的历史 .