Health information to help you understand symptoms. It isn't a diagnosis.
Check symptoms

Troponin test

Also called: Cardiac troponin, High-sensitivity troponin, hs-troponin

A troponin test looks for a heart muscle protein in the blood. It's the main blood test for diagnosing a heart attack.

SampleA small tube of blood from a vein in your arm
Fasting?Usually not needed
ResultsWithin about an hour in the ER
Good to knowOne result rarely tells the whole story. Your provider looks at your results together with your symptoms, exam, and other tests.

What the test is

It's usually done in the emergency room, often repeated over a few hours.

Other conditions, like kidney disease, heart failure, and severe infections, can also raise troponin.

Why it's done

  • Chest pain, shortness of breath, or other signs of a heart attack

Getting ready and what happens

  • None. If you think you're having a heart attack, call 911; don't wait for a test.

How the test is done

  • A health worker cleans the skin, puts a band around your arm, and draws blood from a vein with a small needle. It takes a few minutes.

What the results mean

ResultTypical range for adults
NormalBelow the lab's cutoff (each test and lab sets its own)

Normal ranges vary from lab to lab and can differ by age, sex, and pregnancy. Your report lists your lab's own range next to each result. A result a little outside the range is often not a problem.

Rising troponin

With symptoms, suggests heart muscle damage, such as a heart attack.

Normal on repeat tests

Makes a heart attack much less likely, though other causes of chest pain may still need checking.

When a result needs quick action

Call 911Chest pain or pressure, shortness of breath, or pain spreading to the arm, jaw, or back. Call 911.

Questions to ask your provider

  • What do my results mean for me?
  • Do I need to repeat this test or have other tests?
  • Was there heart damage?
  • Do I need more heart tests?

Risks

A blood draw is very safe. You may have slight pain or a small bruise where the needle went in.

Related conditions

Related medicines

Related tests

Sources

Last updated 2026-11-13.