Creatine kinase (CK), also known as creatine phosphokinase (CPK), is an enzyme found mainly in the heart, brain, and skeletal muscle.
High CK levels may be seen in patients who have:
Brain injury or stroke
Convulsions
Delirium tremens
Dermatomyositis or polymyositis
Electric shock
Heart attack
Inflammation of the heart muscle (myocarditis)
Lung tissue death (pulmonary infarction)
Muscular dystrophies
Myopathy
Additional conditions may give positive test results:
Hypothyroidism
Hyperthyroidism
Pericarditis following a heart attack
Rhabdomyolysis