For these employees, when a holiday falls on a nonworkday -- Saturday or Sunday -- the holiday usually is observed on Monday (if the holiday falls on Sunday) or Friday (if the holiday falls on Saturday).
CK-MB. 1  A creatine kinase-MB (CK-MB) test may be used as a follow-up test to an elevated creatine kinase (CK) in order to determine whether the increase is due to heart damage or skeletal muscle damage.
The creatine phosphokinase test measures the amount of creatine phosphokinase (CPK) present in the blood. The test is also known as creatine kinase, CPK test, and CK test.Creatine phosphokinase is a specific enzyme found primarily in the heart, skeletal muscle, and brain.The creatine phosphokinase test is performed to assess damage to tissue in the brain, muscle tissue, or heart.reatine phosphokinase is a specific enzyme found primarily in the heart, skeletal muscle, and brain. The creatine phosphokinase test is performed to assess damage to tissue in the brain, muscle tissue, or heart.