At a Glance
Why Get Tested?
To determine if you have had a heart attack
When to Get Tested?
If you are having chest pain that may be a heart attack
A blood sample drawn from a vein in the arm
Test Preparation Needed?
The Test Sample
What is being tested?
This test measures the level of troponin in your blood. Troponin is a protein found in muscle that helps it contract. There are two forms that can be measured — troponin I (TnI) and troponin T (TnT) — found in the heart and in other muscles. The tests for these forms of troponin measure only the type found in heart muscle. When a person has a heart attack, troponin is released into the blood. Troponin levels remain high longer than some other substances (such as CK, CK–MB, and myoglobin) that may also be measured if a heart attack is suspected. This becomes important if a person waits for more than a day before going to the doctor after having had chest pain.
How is the sample collected for testing?
A blood sample is taken by needle from a vein in the arm.
Is any test preparation needed to ensure the quality of the sample?
No test preparation is needed.
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NOTE: This article is based on research that utilizes the sources cited here as well as the collective experience of the Lab Tests Online Editorial Review Board. This article is periodically reviewed by the Editorial Board and may be updated as a result of the review. Any new sources cited will be added to the list and distinguished from the original sources used.