Troponin T levels should be under 0.2 micrograms per litre of blood in healthy adults, according to WebMD. This level can vary modestly due to factors such as strenuous exercise, alcohol use and injury.
Troponin T is a cardiac enzyme that is released into the blood following damage to the heart muscle; its levels can be measured with a routine blood test. High levels of troponin T may indicate that a patient has recently suffered a heart attack. Conditions such as an infection affecting the heart or angina, in which the heart muscle doesn't receive adequate oxygen, may also cause a rise in troponin T levels. Troponin T remains in the blood for up to two weeks following heart muscle death, says Mayo Clinic.