These include the small intestine, brain, and uterus. If you have a heart attack, injured heart muscle cells release CK-MB into your blood. Because many tissues contain CK, high levels of CK can be a sign of a variety of problems. Higher CK-MB may point more directly to heart damage. Each year millions of Americans go to the emergency room with chest pain, but only a small amount of those people are having a heart attack or other serious, sudden heart problem.
This test helps your healthcare provider figure out if you're having a heart attack. Measuring CK-MB used to be a common tool for diagnosing heart attacks, but healthcare providers use it less often today. Cardiac troponin is now the test of choice for finding a heart attack.
This is because cardiac troponin is more specific and more sensitive than CK-MB. You may need this test if your healthcare provider thinks you are having a heart attack. Symptoms of a heart attack often include:. Pain or discomfort in the chest, such as a squeezing sensation or feeling of fullness. Your healthcare provider may also order a test to measure cardiac troponin CTn. This test is more often used than CK-MB because it more specifically shows heart damage.
Your healthcare provider may also order an electrocardiogram ECG. This is done to measure electrical activity in your heart and help diagnose a heart attack. Test results may vary depending on your age, sex, health history, the method used for the test, and other things. Your test results may not mean you have a problem. Ask your healthcare provider what your test results mean for you.
Levels of CK-MB do not rise in your blood within the first 4 to 6 hours after a heart attack. You may need to have repeated tests to see if you've had a heart attack. Higher levels of CK-MB may mean that you have had a heart attack or have other heart problems.
These include:. This is an infection and inflammation of the heart muscle. This an infection and inflammation of the thin sac that surrounds the heart.
Higher levels may also be caused by muscle damage elsewhere in your body, by diseases that affect your muscles, and by trauma to your chest. There is very little risk to having a blood test. You may have slight pain or bruising at the spot where the needle was put in, but most symptoms go away quickly. If your results show you have a higher than normal level of CK, it may mean you have an injury or disease of the muscles, heart, or brain.
To get more information, your provider may order tests to check the levels of specific CK enzymes:. Learn more about laboratory tests, reference ranges, and understanding results. Other blood tests, such as an electrolyte panel and kidney function tests , may be ordered along with a CK test. The information on this site should not be used as a substitute for professional medical care or advice. Contact a health care provider if you have questions about your health. Creatine Kinase. What is a creatine kinase CK test?
What is it used for? These diseases include: Muscular dystrophy , a rare inherited disease that causes weakness, breakdown, and loss of function of skeletal muscles. It mostly occurs in males. Rhabdomyolis, a rapid breakdown of muscle tissue.
It can be caused by a serious injury, muscle disease, or other disorder. Why do I need a CK test? You may need a CK test if you have symptoms of a muscular disorder.
What happens during a CK test? Will I need to do anything to prepare for the test? You don't need any special preparations for a CK test. Are there any risks to the test? What do the results mean? To get more information, your provider may order tests to check the levels of specific CK enzymes: If you have higher than normal CK-MM enzymes, it may mean you have a muscle injury or disease, such as muscular dystrophy or rhabdomyolis.
If you have higher than normal CK-MB enzymes, it may mean you have an inflammation of the heart muscle or are having or recently had a heart attack. If you have higher than normal CK-BB enzymes, it may mean you have had a stroke or brain injury. Other conditions that can cause higher than normal CK levels include: Blood clots Infections Hormonal disorders, including disorders of the thyroid and adrenal glands Lengthy surgery Certain medicines Strenuous exercise If you have questions about your results, talk to your health care provider.
Is there anything else I need to know about a CK test? References Cedars-Sinai [Internet]. Los Angeles: Cedars-Sinai; c
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