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Creatine Kinase (CK)

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Also known as: CK; Total CK; Creatine Phosphokinase; CPK
Formal name: Creatine Kinase

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At a Glance

Why Get Tested?

To detect and monitor muscle damage; to help diagnose conditions associated with muscle damage; for heart attack detection, this test has been largely replaced by troponin T and I – markers more specific to cardiac tissue; however, it may sometimes be used to help detect a second or subsequent heart attack (see Common Questions #4).

When to Get Tested?

When you have muscle weakness, muscle aches, and/or dark urine and your healthcare practitioner suspects muscle damage; sometimes to monitor for muscle injury resolution or persistence

Sample Required?

A blood sample drawn from a vein in your arm

Test Preparation Needed?