troponin
Pronunciation: TROE-poe-nin
Cardiac biomarker proteins released during myocardial injury, used for diagnosing acute coronary syndromes.
Full Definition
Troponin refers to a complex of regulatory proteins (troponin I, T, and C) found in cardiac muscle, with troponin I and T serving as highly sensitive and specific biomarkers for myocardial injury. High-sensitivity troponin assays can detect very low concentrations, enabling earlier diagnosis of myocardial infarction and risk stratification in acute coronary syndromes. In cardiovascular research, troponin levels serve as diagnostic criteria, surrogate endpoints, and prognostic indicators. Studies must specify which troponin subtype (I or T), assay type (conventional or high-sensitivity), and decision thresholds are used. Editors should ensure consistent units and reference ranges are reported throughout manuscripts.
Usage
Usage note: Specify subtype (I or T) and assay sensitivity (conventional vs. high-sensitivity) when relevant. Include appropriate units and reference ranges.
In Context
- "High-sensitivity troponin I levels were measured at 0, 3, and 6 hours after presentation." — Diagnostic accuracy study
- "Peak troponin values correlated strongly with final infarct size on cardiac MRI." — Biomarker validation research