Creatine Kinase-MB (CK-MB) is an isoenzyme of creatine kinase found in higher proportions in heart muscle. Its levels may rise when heart muscle cells are damaged.
Supports Heart Attack Evaluation
CK-MB may be used in selected situations alongside ECG, cardiac troponin, symptoms, and medical history when heart muscle injury is suspected.
Helps Assess Changes Over Time
CK-MB levels rise and fall after heart muscle injury. Repeat testing may provide useful information based on these changes.
May Help Assess Recurrent Heart Muscle Injury
Since CK-MB levels generally return to normal sooner than troponin, repeat testing may provide useful information when recurrent heart muscle injury is suspected.
Provides Additional Information
CK-MB can add useful information when doctors are evaluating possible heart muscle injury alongside other cardiac tests.