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 CK-MB test is generally considered to be more useful when checking for damage to the heart because CK-MB is mostly found in the heart muscle cells; a high CK test result may indicate damage to the heart, but it could also mean that other muscles in the body are damaged. How is the test done?