Lactate

metabolite

Lactate elevation reflects myocardial anaerobic metabolism and hypoxia during acute coronary syndrome.

Pathway placement

Cascade stepOff-pathway / systemic markers

Confidencehigh

RationaleACS diagnosis biomarker and myocardial energy-metabolism indicator; off-pathway systemic marker.

Also acts inMyocardial injury

Druggability

Not assessed (no mapped human gene target).

Type I vs Type II discrimination

ScoresIndeterminate

R — rupture / Type-I

C — confounder / Type-II

A — assay feasibility

E — evidence strength

T1DI (composite)

Specificity differential (R−C)+19.1

Confounder panel (Type-II drivers)

1sepsis / systemic inflammationmag 2

2anemia / acute blood lossmag 0

3hypovolemia / dehydrationmag 2

4tachyarrhythmiamag 2

5hypoxemia / respiratory failuremag 1

6hypertensive emergencymag 1

7high-demand / peri-operative stressmag 2

Coverage: 7/7 confounders with evidence

Tier: deep-scored (abstract-extracted) · 18 supporting references. See the discrimination table for all markers.

Validated clinical assay

Specimen

Plasma (fluoride) or whole blood (blood gas)

Collection tube

Sodium fluoride/K-oxalate (grey-top) · Lithium heparin (green-top)

Method / principle

Enzymatic amperometric (blood gas) or colorimetric

Reagent / substrate

Lactate oxidase → H2O2, amperometric or Trinder

Platform

Blood-gas analyzer / POC / chemistry analyzer

Turnaround · availability

STAT · Universal