What is troponin I and troponin T?

Definition. A troponin test measures the levels of troponin T or troponin I proteins in the blood. These proteins are released when the heart muscle has been damaged, such as occurs with a heart attack. The more damage there is to the heart, the greater the amount of troponin T and I there will be in the blood.

What is a high troponin T level?

Cardiac troponin T is measured in nanograms per milliliter (ng/mL). If your troponin T level is above the 99th percentile for the test being used, your doctor will likely diagnose a heart attack. Levels that start high and fall suggest a recent injury to the heart. It could have been a mild heart attack.

What is a normal troponin T level?

The normal range (value) for high-sensitivity cardiac troponin T test (hs-cTnT) is 14 ng/l. This cutoff for the “normal” level of troponin T was determined by looking at several studies of patients who were “apparently healthy” (no heart complaints) and had this level of troponin T in the bloodstream as a baseline.

What does troponin T do?

Troponin T (TnT) is the tropomyosin-binding and thin filament-anchoring subunit of the troponin complex in skeletal and cardiac muscles. At the center of the sarcomeric thin filament regulatory system of striated muscles, TnT plays an essential role in transducing Ca2+ signals in the regulation of contraction.

What is the function of troponin T?

Troponin T (TnT) is one of the three subunits that form troponin (Tn) which together with tropomyosin is responsible for the regulation of striated muscle contraction. All three subunits of cardiac Tn as well as tropomyosin have been associated with hypertrophic cardiomyopathy (HCM).

What do you do if TROP T is positive?

A patient with a positive troponin T test should be treated aggressively because even a low level of the enzyme means he’s at increased risk for cardiac death, according to a study presented at the recent American Heart Association (AHA) meeting.

What is troponin T used for?

What is it used for? This test is most often used to diagnose a heart attack. It is sometimes used to monitor angina, a condition that limits blood flow to the heart and causes chest pain. Angina sometimes leads to a heart attack.

What does low troponin T mean?

Even very low levels of cardiac troponin T are associated with increased risk for heart failure and cardiovascular death among patients with stable heart disease, according to an industry-funded study in the New England Journal of Medicine.

What is Trop T test negative?

A negative test result refers to a normal test, where troponin is not detected in the blood. Some doctors also consider a normal troponin test to put a patient in a lower risk category for any serious cardiac events within the following few weeks.