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.
What Does CK Mean in Blood Test Results: The Bottom Line. An elevated CK level on a blood test usually needs further evaluation and testing. If a person is experiencing chest pain and CK-MB is high, it can be a sign of heart damage due to heart attack.