Dr. Tony Huge and Dr. Tim discuss CPK-MB Tests for heart enzymes and how it is affected by the use of anabolic steroids. However it CPK-MB can also be affected by many other factors, especially for bodybuilders who go through intense training and diets.
CPK-MB Test: “is a cardiac marker used to assist diagnoses of an acute myocardial infarction. It measures the blood level of CK-MB, the bound combination of two variants of the enzyme phosphocreatine kinase” (Wikipedia)