Troponin T, like troponin I, is a heart muscle-specific protein released into the bloodstream when myocardial damage occurs. Troponin T measurement is crucial for the diagnosis and management of heart disease, particularly acute coronary syndromes (ACS).

Troponin T is a highly specific biomarker of myocardial damage. In the event of damage to the heart muscle, as in a myocardial infarction, troponin T is released into the blood. Its high sensitivity and specificity make it the tool of choice for diagnosing infarctions.

Troponin T begins to rise in the blood around 3 to 6 hours after the onset of cardiac lesions, peaks at 12-48 hours and remains elevated for 10 to 14 days. This prolonged period means that infarctions can be detected over a longer period.
In the event of chest pain, measurement of troponin T helps to distinguish an acute coronary syndrome (such as myocardial infarction or unstable angina) from other non-cardiac causes of chest pain. An increase in troponin T is strongly indicative of cardiac damage.

Troponin T levels can also help assess the severity of acute coronary syndrome. Patients with higher levels of troponin T generally have a poorer prognosis and an increased risk of complications, including sudden death.
Because of its long duration of elevation, troponin T is useful for monitoring patients after a myocardial infarction, even several days after the event.

Troponin T can be increased in patients with heart failure, indicating myocardial damage. Measuring it can help assess the severity of heart failure and adjust treatment.