The elevation of ultrasensitive troponin T is mainly considered as acute myocardial ischemia. As an important component of myocardial markers, troponin T, together with myoglobin, creatine kinase and creatine kinase isoenzymes, is called myocardial markers. Troponin begins to rise 4-6 hours after the onset of an infarction, peaks at 24 hours, and then begins to fall. If a patient has sudden acute chest pain and tightness with heavy sweating that does not subside, he or she should call 120 and go to the emergency department or chest pain center of a nearby hospital to have blood tests for myocardial markers drawn by a doctor. If the patient has elevated troponin, consider acute coronary syndromes, including unstable angina and acute myocardial infarction, but there are a few patients with non-cardiogenic causes of troponin elevation. The main causes include severe heart failure, severe renal failure, tumors, and severe infections, which can also lead to elevated troponin, but all are mildly elevated.