What is it?

The Creatine Kinase-MB (CK-MB) test is a blood test used to measure the level of a specific enzyme called creatine kinase-MB in the blood. CK-MB is primarily found in heart muscle cells. When heart muscle is damaged, such as in a heart attack, CK-MB levels rise in the blood.

Who is it for?

This test is often ordered:

• When a person has symptoms of a heart attack, such as chest pain, shortness of breath, or arm pain.
• To monitor the effectiveness of treatment for a heart attack.
• To diagnose other conditions that can cause elevated CK-MB levels, such as muscle injury or certain medications.

Outcome:

• Elevated CK-MB levels can indicate heart muscle damage, suggesting a heart attack or other cardiac event.
• Normal CK-MB levels do not rule out a heart attack, especially if other symptoms or test results suggest it.

Preparation:

• Fasting: You may need to fast for a few hours before the test.
• Medications: Inform your doctor about any medications you are taking, as some can affect CK-MB levels.

Important Note: The CK-MB test is often used in conjunction with other cardiac markers, such as troponin, to provide a more accurate diagnosis of a heart attack.