The troponin-I test is a laboratory test that measures the levels of troponin-I protein in the blood. Troponin is a protein found in heart muscle cells, and it is released into the bloodstream when there is damage to the heart. The troponin-I test is used to help diagnose a heart attack, also known as a myocardial infarction. Troponin-I levels rise within hours after a heart attack and remain elevated for several days, making it a useful tool for diagnosing a heart attack even if other tests, such as an electrocardiogram, are inconclusive. The test is highly sensitive and specific, and it is commonly used in emergency departments and hospitals to help identify patients who may be having a heart attack.
