Creatine kinase isoenzyme test result is 64U/L, which is higher than normal. The normal value of creatine kinase isoenzyme will be affected by different reagents and instrument parameters, slightly changed, probably the normal range is around 0~18U/L, the value over the normal suggests that it is abnormal. Creatine kinase isoenzyme test results are very important for determining whether the myocardium is damaged. When myocardial cells are damaged due to myocardial infarction or myocarditis, the level of creatine kinase isoenzyme in the serum will increase rapidly. For example, in acute myocardial infarction, the level of creatine kinase isoenzyme will increase rapidly within 6 hours of the onset of the disease, and will reach a peak in about 24 hours, and will return to normal within 3~4 days if the condition is stable. If you find that your creatine kinase isoenzyme is higher than normal, you should go to the hospital and seek treatment in the cardiology department or emergency department.