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Creatine Phosphokinase
Aka: Creatine Phosphokinase, Creatine Kinase, Creatine Phosphotransferase, CPK, CK-MB, CK-MM, CK-BB
- See Also
- Serum Cardiac Markers
- Physiology
- Transferase class enzyme activated by Magnesium
- Catalyzes ATP energy storage as phosphocreatine
- Phosphocreatine stored in muscle and brain
- Phosphocreatine keeps ATP constant at Exercise start
- Increased
- Myocardial Infarction
- Myocarditis
- Rhabdomyolysis
- Myositis
- Crush injury or trauma
- Dermatomyositis or Polymyositis
- Vigorous Exercise
- Muscular Dystrophy
- Myxedema
- Seizure
- Malignant Hyperthermia
- Intramuscular Injections
- Cerebrovascular Accident
- Pulmonary infarction
- Pulmonary Embolus
- Acute Aortic Dissection
- Isoenzymes:
- MB: Heart
- MM: Skeletal muscle
- BB:
- Brain
- Bowel infarction
- Neoplasm (Prostate, GI, Breast, Ovary, Lung, Brain)
- Protocol: Acute Coronary Syndrome Evaluation
- Obtain Serial CPK every 6 hours for total of 3 values
- Fractionate to CK-MB only if CPK increased
- CK-MB >5% of total CPK suggests Myocardial Infarction