I was told that this level was high and that I should have it checked by a physican. The lab tech said this reading could be caused by extreme exercise which I had not done that day. 36 Dear Gale, CK or creatine kinase is a muscle enzyme that is released when there is muscle damage to any muscle including the heart. I would suggest that you folloow this up with your physician. I hope you find this information useful.
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