The mb enzyme is also known as CKMB creatine kinase isoenzyme, CK is a creatine kinase, and the ratio of CKMB to CK, is the MB enzyme activity ratio. CKMB creatine kinase isoforms are mainly found in cardiac muscle tissue, while CK creatine kinase is found in skeletal muscle, cardiac muscle tissue, smooth muscle and other muscle tissues throughout the body.The MB enzyme activity ratio is often used to determine the proportion of myocardial injury in the whole body muscle injury, and the higher the ratio, the more serious the damage to cardiac myocytes, and the higher the ratio is commonly found in diseases such as myocardial infarction, myocarditis, and ischemic heart disease. If the ratio of CKMB to CK is elevated, there may be other reasons, and you should consult the doctor in time to find out the reasons and treat under the doctor’s guidance to avoid delaying your condition.