The troponin-T test is a blood test used to measure the levels of troponin-T in the blood. Troponin-T is a protein found in cardiac muscle cells, and when the heart muscle is damaged or injured, such as during a heart attack, troponin-T is released into the bloodstream. Therefore, the troponin-T test is commonly used to diagnose and monitor heart attacks, as it can detect even small amounts of troponin-T in the blood. Elevated levels of troponin-T in the blood can indicate damage to the heart muscle, and the results of this test can help guide treatment decisions and predict a patient’s prognosis.