When the total CPK level is very high, it usually means there has been injury or stress to the heart, the brain, or muscle tissue. For example, when a muscle is damaged, CPK leaks into the bloodstream. Determining which specific form of CPK is high helps doctors determine which tissue has been damaged.
The pattern and timing of a rise or fall in CPK levels can be diagnostically significant, particularly if a heart attack is suspected.
Special Preparation: None.