Cardiac enzyme test is a blood draw. Cardiac enzymes are the general name for a variety of enzymes in the heart muscle cells. When the heart is damaged due to various diseases, these enzymes will be released into the bloodstream, and changes in the enzyme levels in the bloodstream can indicate the condition of the heart. Therefore, cardiac enzymes need to be tested by taking peripheral venous blood. Commonly used clinical indicators of cardiac enzymes include creatine kinase and isoenzymes, lactate dehydrogenase, aspartate aminotransferase, and alpha-hydroxybutyrate dehydrogenase. Elevated cardiac enzymes are commonly seen in myocardial infarction, myocarditis, etc. However, a variety of skeletal muscle and liver pathologies can also cause elevation of certain enzymes. Therefore, cardiac enzymes and other tests should be determined by the physician according to the patient’s condition and evaluated in conjunction with other tests. If there is any discomfort, it is recommended to go to the hospital for treatment so as not to delay the condition.