troponin
noun
tro·po·nin
ˈtrō-pə-nən 
ˈträ-
ˈträ-
-ˌnin
: a protein of muscle that together with tropomyosin forms a regulatory protein complex controlling the interaction of actin and myosin and that when combined with calcium ions permits muscular contraction
Examples of troponin in a Sentence
Recent Examples on the Web
These tests may include troponin, thyroid, parathyroid, and electrolyte assays, as well as many others.2
Talk to your healthcare provider about your biotin use before undergoing lab tests.
—
Ayesha Gulzar, Verywell Health, 17 Sep. 2025
Scientists in that study followed up with people who had faced chest pain and elevated amounts of troponin in their blood, a protein that usually signals some kind of heart damage.
—Paula Cohen, CBS News, 21 May 2025
There, doctors discovered dangerously elevated troponin levels, a protein that indicates damage to the heart.
—Jessica Lynch, Billboard, 13 May 2025
Broken heart syndrome can cause an increase in a cardiac enzyme called troponin, in the blood, that is also elevated by a heart attack.
—Allison Aubrey, NPR, 17 Feb. 2025
Troponin is more specific and sensitive than CK, as cardiac troponin only increases when there's damage to the heart muscle.
—Jillian Kubala, Health, 31 Dec. 2024
In an 11-patient study, the therapy showed some reduction in heart disease markers like left ventricle size and troponin levels.
—Meghana Keshavan, STAT, 15 July 2024
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Ayesha Gulzar, Verywell Health, 17 Sep. 2025
Scientists in that study followed up with people who had faced chest pain and elevated amounts of troponin in their blood, a protein that usually signals some kind of heart damage.
—Paula Cohen, CBS News, 21 May 2025
There, doctors discovered dangerously elevated troponin levels, a protein that indicates damage to the heart.
—Jessica Lynch, Billboard, 13 May 2025
Broken heart syndrome can cause an increase in a cardiac enzyme called troponin, in the blood, that is also elevated by a heart attack.
—Allison Aubrey, NPR, 17 Feb. 2025
Troponin is more specific and sensitive than CK, as cardiac troponin only increases when there's damage to the heart muscle.
—Jillian Kubala, Health, 31 Dec. 2024
In an 11-patient study, the therapy showed some reduction in heart disease markers like left ventricle size and troponin levels.
—Meghana Keshavan, STAT, 15 July 2024
Cite this Entry
“Troponin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/troponin. Accessed 30 Oct. 2025.
Copy CitationMedical Definition
troponin
noun
tro·po·nin
ˈtrōp-ə-nən
ˈträp-
ˈträp-
-ˌnin
: a protein of muscle that together with tropomyosin forms a regulatory protein complex controlling the interaction of actin and myosin and that when combined with calcium ions permits muscular contraction
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