The degree of myocardial injury associated with pediatric cardiac catheterization is unknown (1, 2). The measurements of creatine kinase and creatine kinase isoenzyme MB (CK-MB) are still used as markers of myocardial damage. However, the release of cardiac troponins into the blood provides the most sensitive and specific biochemical marker of myocardial damage that is currently available.
This test is most often used to diagnose a heart attack. It is sometimes used to monitor angina, a condition that limits blood flow to the heart and causes chest pain. Angina sometimes leads to a heart attack.
This test may also be used after you were diagnosed with a heart attack and admitted to a hospital. Testing is usually repeated two or more times in a 24-hour period. This is done to see if there are any changes in troponin levels over time.
You may need this test if you have been admitted to the emergency room with symptoms of a heart attack. These symptoms include:
Chest pain or discomfort
Pain in other parts of the body, including your arm, back, jaw, or neck
Nausea and vomiting