Abstract
The existing markers for myocardial necrosis, such as cardiac troponin, creatine kinase‐MB, and myoglobin are thought to be released into blood following irreversible myocardial necrosis. Thus results of these tests are usually negative for patients with acute coronary syndromes (ACS) who present to the emergency department (ED) within the first 3 hours after the onset of chest pain. Given the need to make early therapeutic and triage decisions, biomarkers that can be used to diagnose and/or risk stratify ACS patients during their initial ED presentation will be important. Active research in this area has identified several classes of biomarkers that show promise for early detection of disease. These include tests for the presence of acute inflammation and infiltration (e.g., high sensitivity‐C‐reactive protein, myeloperoxidase), plaque instability (e.g., pregnancy‐associated plasma protein‐A, placental growth factor), platelet activation (e.g., whole blood choline, platelet density, CD40 ligand), and myocardial ischemia (e.g., ischemia modified albumin, free fatty acids, serum choline, and B‐type natriuretic peptide). Each of these tests has demonstrated some utility for early diagnosis. However, as most lack specificity for myocardial disease, routine use may require a multi‐marker approach.
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