CK-MB is a form of the enzyme creatine kinase found mainly in heart muscle.
- Normal range (adults)
- Up to 25 U/L
- Sample
- Blood
- Fasting
- Not usually needed
- Also called
- Creatine Kinase MB, CK MB, CKMB, Creatine Kinase Myocardial Band
CK-MB normal range
| Group | U/LSame unit in all countries |
|---|---|
| Adults | Up to 25 |
Ranges vary slightly between laboratories. The range printed on your own report is the one to go by.
Why is the CK-MB test done?
It was used to detect heart attacks before troponin and is still used by some labs, mainly to detect a second heart attack.
What does a high CK-MB level mean?
A raised CK-MB suggests heart muscle injury, though skeletal muscle damage can also raise it.
Common causes
- Heart attack
- Heart surgery or myocarditis
- Severe skeletal muscle injury
Diet and lifestyle tips
- Follow your doctor's heart-health advice
When should you see a doctor?
Any raised heart marker with chest symptoms needs urgent care.
Last updated
This page is for general education and is not a diagnosis. Normal ranges differ between laboratories, so always compare your result with the reference range printed on your own report, and discuss abnormal results with your doctor.