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.
Creatine kinase - Laboratory testing. 1  CK is often determined routinely in a medical laboratory. 2  Creatine kinase in the blood may be high in health and disease. 3  Furthermore, the isoenzyme determination has been used extensively as an indication for myocardial damage in heart attacks. 4  Reference ranges for blood tests.