what is a creatine kinase blood test for
The creatine kinase test measures the blood levels of certain muscle and brain enzyme proteins. Creatine kinase (CK or CPK) is an enzyme (a type of protein) found in muscle and brain.Normally, very little CK is found circulating in the blood. Elevated levels indicate damage to either muscle or brain; possibly from a myocardial infarction (heart attack), muscle disease, or stroke.reatine kinase (CK or CPK) is an enzyme (a type of protein) found in muscle and brain. Normally, very little CK is found circulating in the blood.