High-sensitivity troponin T is a highly specific marker of myocardial injury and can reduce the rate of missed detection of acute coronary syndromes and myocardial infarction. The normal value of high-sensitivity troponin T detection in the majority of healthy individuals is between 0 and 0.04 ng/ml. When the test value exceeds the uppermost limit of normal, myocardial damage is considered. Troponin is a structural protein found in cardiac muscle cells and is detected when damage to cardiac muscle cells occurs and troponin is released into the peripheral blood. Troponin T is a marker of myocardial necrosis and is commonly used in the diagnosis of acute myocardial infarction. It can also cause a mild elevation of troponin T bodies in heart failure, viral myocarditis, renal failure, and during strenuous exercise. When high-sensitivity troponin T is found to be elevated clinically, it must be combined with the patient’s clinical signs and symptoms as well as auxiliary tests such as electrocardiogram to improve the rate of confirming myocardial infarction to avoid misdiagnosis.