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A Creatine Kinase (CK) blood test is a test that measures the level of CK enzymes in the blood. CK enzymes are found in the heart, brain, and skeletal muscles, and they play a role in the production of energy within the body. A high level of CK enzymes in the blood can be a sign of muscle damage or a heart attack. The test is typically done along with other tests, such as an electrocardiogram (ECG), to help diagnose conditions that may be causing elevated CK levels.
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