Sort of, not exactly
The ck is an enzyme present in muscle, but also the bones and the brain.
There is a sub-type that we still use to some extent, the ck-mb fraction to help diagnosis heart
attacks. Now a days we measure a different protein
, the troponin-i to more accurrately diagnosis acute heart attacks. The ck can be a marker of muscle damage from many causes and is influenced by many other disease states.