Troponin trend
Formal Definition
Serial measurement of serum troponin (I or T) at defined intervals (typically 0 and 3 hours, or 0 and 6 hours depending on assay) to detect a clinically significant rise-and-fall pattern indicating myocardial injury; a single value is insufficient to rule in or rule out ACS.
How It's Used on the Ward
"Trending trops" or "trops are trending up" — standard language in any chest pain workup; a rising troponin is the key laboratory marker of myocardial infarction.
Example
""Chest pain since 2 AM: first trop 0.04, repeat at 3 hours is 1.2 — that's a significant delta. EKG has new T-wave inversions in V4–V6. Activating the cath lab, cardiology at bedside.""
Clinical Context
High-sensitivity troponin assays (hsTnI, hsTnT) are now standard — they detect injury much earlier but also flag non-ischemic troponin elevation (PE, myocarditis, demand ischemia, renal failure). The "delta" (change between values) matters as much as the absolute number. Type 1 MI = plaque rupture; Type 2 MI = supply-demand mismatch (sepsis, tachycardia, severe anemia). Distinguish before deciding on anticoagulation.
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