ST elevation myocardial infarction risk stratification and prognosis
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Two main risk-stratification scores are used when assessing a patient with ST elevation MI and acute coronary syndromes; the TIMI Risk Score (for MI), and the GRACE risk score (for acute coronary syndrome.
Risk Stratification in a Patient with ST Elevation MI
- The Thrombolysis in Myocardial Infarction (TIMI) risk score for STEMI:
- The TIMI risk score for STEMI was created from simple arithmetic sum of independent predictors of mortality weighted according to the adjusted odds ratios from logistic regression analysis.
- The patient pool (n=14114) came from the Intravenous nPA for Treatment of Infarcting Myocardium Early II trial (TIME II).
- The TIMI risk score was subsequently validated in an unselected heterogeneous community population through the National Registry of Myocardial Infarction (NRMI) 3 & 4.
- The Global Registry of Acute Coronary Events (GRACE) risk score for ACS:
- The GRACE risk score was created from a multivariable logistic regression model using ACS patients enrolled in the GRACE registry (N=11389).
- The GRACE risk score was validated using subsequent cohort of patients enrolled in GRACE (n=3972) and the Global Use of Strategies to Open Occluded Coronary Arteries IIb (GUSTO-IIb) trial (n=12142).