TIMI Risk Score (UA/NSTEMI)
Each of the seven clinical variables contributes one point. The total score predicts 14-day risk of death, myocardial infarction, or urgent revascularization.
TIMI UA/NSTEMI score
0
Risk interpretation
Low risk
≈4.7% risk of death/MI/revascularization in 14 days
How to Use This Calculator
Review emergency department data
Compile history, ECG changes, biomarker results, and recent aspirin exposure upon presentation.
Tick each positive risk factor
Each criterion adds one point; totals range from 0 to 7.
Align management with risk
Higher scores warrant aggressive antithrombotic therapy and early invasive evaluation per ACS guidelines.
Formula
TIMI UA/NSTEMI score = Sum of 7 binary variables (age ≥65, ≥3 CAD risk factors, known CAD ≥50%, aspirin use in last 7 days, ≥2 angina episodes within 24 h, ST deviation ≥0.5 mm, elevated cardiac biomarkers).
Full Description
The TIMI risk score for unstable angina/non–ST elevation myocardial infarction predicts short-term adverse cardiac events and assists treatment planning. It is simple, reliable, and validated across multiple cohorts. Scores of 0–2 indicate relatively low risk, whereas scores ≥5 represent high risk and support early invasive strategies and intensive antithrombotic therapy.
Frequently Asked Questions
What counts as CAD risk factors?
Family history of premature CAD, hypertension, hyperlipidemia, diabetes, or current smoking each qualify.
Do high-sensitivity troponins count?
Yes. Any troponin elevation above the 99th percentile upper reference limit fulfills the biomarker criterion.
Can the score guide hospital admission decisions?
Scores ≥3 generally merit admission and early invasive consideration; integrate with clinical judgement and comorbidities.
How often should I recalculate the score?
Reassess if new data emerge (e.g., biomarkers turn positive, ECG evolves) to update risk stratification.