Myocardial enzyme profile is a general term for a variety of enzymes present in the myocardium, generally creatine kinase (CK), aspartate aminotransferase (AST), and lactate dehydrogenase (LDH), which are released to varying degrees into the serum after myocardial injury. Therefore, clinical blood draws are able to detect the levels of these enzymes (high or normal?) . Among them, CK-MB and LDH1 have the highest specificity. The current normal values of myocardial enzyme profiles are mostly adult standards, while the normal values in pediatric patients are higher than adults, and the majority of children have myocardial enzyme profiles that are two to three times higher than the normal reference values in adults. Because of the many factors affecting the cardiac enzyme profile, many hospitals use the measurement of cardiac troponin to aid in the diagnosis of myocarditis or myocardial infarction. It is worth noting that both the distribution and content of creatine kinase (CK) are highest in skeletal muscle, not in cardiac muscle. Therefore, those with elevated creatine kinase (CK) should pay attention to the presence of muscle weakness, myasthenia gravis, and other abnormal manifestations of skeletal muscle. Cardiac and skeletal muscle diseases can be differentiated by ECG and EMG examinations. In conclusion, the reference to myocardial enzyme profile is not too reasonable, and it is easy for people to misunderstand that abnormal myocardial enzyme profile means that there is something wrong with the heart muscle.