What is the CPK Isoenzyme Electrophoresis Test?

The CPK Isoenzyme Electrophoresis Test separates the different isoenzymes of Creatine Phosphokinase (CK/CPK), including CK-MM (skeletal muscle), CK-MB (heart muscle), and CK-BB (brain). By identifying which isoenzyme is elevated, the test helps determine the source of tissue damage and supports the diagnosis of muscle disorders, myocardial injury, and certain neurological conditions.

Who should take this test?

• Individuals with elevated total CPK/CK levels.
• Patients with suspected muscle injury or muscle disease.
• People experiencing chest pain when cardiac muscle damage needs evaluation.
• Individuals with suspected muscular dystrophy, inflammatory muscle disease, or rhabdomyolysis.
• Patients with certain neurological disorders.
• Doctor-recommended investigation of the source of elevated CPK levels.

Preparation & Test Process

Understanding Your Results

Elevated CK-MM is commonly associated with skeletal muscle injury, muscular dystrophy, heavy exercise, or inflammatory muscle disorders.

Elevated CK-MB may indicate injury to the heart muscle, although cardiac troponin testing is now more commonly used for diagnosing heart attacks.

Elevated CK-BB is uncommon but may be associated with certain neurological conditions or brain injury.

Results should always be interpreted together with your symptoms, ECG findings, cardiac troponin levels, total CPK, and other laboratory investigations.

FAQs – CPK Isoenzyme Electrophoresis Test