Crackerjack4u2 provided an excellent explanation.
Phosphatine kinease (or CPK) is a protein, specifically an enzyme, that muscle cells use to function. A certain quantity of this enzyme is contained within the walls of every single muscle cell. The heart, in particuliar, sems to have slightly higher levels. When there is muscle damage, and the cell walls rupture from death or physical destruction, CPK "spills" into the bloodstream. The more cells damaged, the higher the level of CPK. When the heart muscle is damaged from lack of oxygen, and cells die (this is called called an infarct) CPK oozes into the bloodstream, thereby providing an easy means to determine of there has been death of cardiac tissue following symptoms of cardiac ischemia (substernal chest pain, etc.).
A secondary means to measure danage is to look at the EKG, and observe the ST segment for depression.
When an ambulance brings a patient into the ER who has typical complaints suggesting cardiac ischemia (lack of oxygen to the heart - the term "heart attack" is medically meaningless) modern ER's immediately obtain a blood sample to determine the CPK levels.
As Crackerjack4u2 stated there is nothing specific you can do to bring levels down. Indeed, to do so would eliminate a means for the physician to measure the severity of muscle damage.
Hello.
Elevated CK is generally evidence of muscle damage. High CK can indicate or can be seen in heart attack, polymyositis, muscular dystrophy, dermatomyositis, and sometimes myositis, also sometimes seen in some people with underactive thyroid gland or malignant hyperthermia, and an abnormally elevated temperature that develops because of certain anesthetics.
False high readings can occur following surgery that involved an incision through a muscle, strenuous exercise within 24 hours of test, and intramuscular injections.
If the CK is elevated because of actual muscle damage like a heart attack, there is nothing you can do to bring it down. The amount of muscle damage will remain as will the elevation in this level measuring that damage.