Troponin Test

What is Troponin Test?

A troponin test is a laboratory blood test used to diagnose a heart attack. It is named after troponin, a protein that helps control muscle contractions. The purpose of a troponin test is to measure the amount of troponin that is released into the blood after a heart attack.


No special preparation is needed for a troponin test, but your doctor may advise you to fast (refrain from eating or drinking) for 8-12 hours prior to the test.


The troponin test is performed by taking a blood sample from a vein in your arm or your wrists. The sample is then analyzed for troponin levels in the laboratory.

Types of Troponin Tests

There are two types of troponin tests that are commonly used in diagnosis:

  • Troponin T (TnT): measures the amount of troponin T proteins in the bloodstream.
  • Troponin I (TnI): measures the amount of troponin I proteins in the bloodstream.


There are no serious risks associated with a troponin test. Some people may experience slight discomfort or pain when a blood sample is taken.

Why is a Troponin Test Used?

A troponin test is used to detect and diagnose a heart attack. When the heart muscle is damaged during a heart attack, it releases troponin proteins into the bloodstream. The amount of troponin proteins in the bloodstream can be measured with a troponin test. High levels of troponin in the bloodstream are an indication of a heart attack.

When is a Troponin Test Used?

A troponin test is usually recommended when a person is experiencing chest pain, shortness of breath, or other symptoms of a heart attack. It may also be used to monitor heart health in people who have had a heart attack or are at risk for a heart attack.