cardiac biomarkers
Pronunciation: KAR-dee-ak BYE-oh-mar-kers
Blood proteins released when heart muscle is damaged, used to diagnose and monitor acute coronary syndromes.
Full Definition
Cardiac biomarkers are measurable substances in the blood that indicate myocardial injury or stress. The most commonly used biomarkers include cardiac troponins (troponin I and T), which are highly specific for myocardial damage, and creatine kinase-MB (CK-MB). These markers are essential for diagnosing acute myocardial infarction and risk stratification in acute coronary syndromes. The timing of biomarker elevation, peak levels, and duration of elevation provide important information about the extent and timing of cardiac injury.
Usage
Usage note: Prefer 'cardiac biomarkers' over the older term 'cardiac enzymes' in modern medical writing.
In Context
- "Serial cardiac biomarkers showed a typical rise and fall pattern consistent with myocardial infarction." — Emergency department evaluation
- "Elevated cardiac biomarkers prompted immediate cardiology consultation and catheterization." — Hospital admission note