TIMI Risk Score Calculator (UA/NSTEMI)
The TIMI risk score for unstable angina / non-ST-elevation MI sums seven equally-weighted clinical predictors (0β7) to estimate the 14-day risk of death, new or recurrent myocardial infarction, or severe recurrent ischaemia needing urgent revascularisation.
Quick answer
The TIMI risk score for UA/NSTEMI adds one point each for seven predictors β age 65 or over, three or more CAD risk factors, known coronary stenosis β₯50%, aspirin in the past 7 days, two or more anginal episodes in 24 hours, ST deviation β₯0.5 mm, and elevated cardiac markers. The total (0β7) maps to a 14-day risk of death, MI, or urgent revascularisation from 4.7% to 40.9%.
TIMI risk predictors (1 point each)
Low risk (0β2) Β· 14-day event rate 4.7%
The TIMI risk score is 0/7: low risk (0β2). In the Antman 2000 derivation, this corresponds to a 14-day rate of 4.7% for the composite of death, new or recurrent MI, or severe recurrent ischaemia requiring urgent revascularisation.
This is the UA/NSTEMI version (a separate TIMI score exists for STEMI). It is a prognostic aid, used with the full clinical picture, troponin and ECG β not a substitute for clinician assessment.
How to use the TIMI (UA/NSTEMI) calculator
- 1Tick the seven predictors. Tick each predictor that is present: age β₯65, β₯3 CAD risk factors, known coronary stenosis β₯50%, aspirin use in the last 7 days, β₯2 anginal episodes in 24 hours, ST-segment deviation β₯0.5 mm on the admission ECG, and elevated cardiac biomarkers.
- 2Read the score. The tool sums the points (0β7).
- 3See the 14-day event rate. The tool shows the Antman 2000 14-day composite event rate (death / MI / urgent revascularisation) for that score, and a low / intermediate / high band, to interpret with a clinician.
Medical disclaimer: This is general health information, not medical advice. It does not diagnose or treat any condition, and the results are estimates based on public reference formulas. Always consult a qualified doctor about your individual health. If you think you may have a medical emergency, contact your local emergency services immediately.
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Book a consultationFrequently asked questions
What does the TIMI score predict?β
In UA/NSTEMI it predicts the 14-day risk of the composite of all-cause death, new or recurrent myocardial infarction, or severe recurrent ischaemia requiring urgent revascularisation. The rate rises from 4.7% at a score of 0β1 to 40.9% at 6β7.
Is this the same as the TIMI score for STEMI?β
No. This is the TIMI score for unstable angina / NSTEMI (Antman 2000). There is a separate, differently-weighted TIMI score for ST-elevation MI (STEMI). Use the one that matches the presentation.
Does aspirin use really increase the TIMI score?β
Yes β recent aspirin use is one of the seven predictors. People already taking aspirin who still develop an acute coronary syndrome tend to have higher risk, which is why it scores a point in the original model.
Is my data stored?β
No. The calculator runs entirely in your browser; nothing you enter is sent to a server.
Sources & validation
This calculator reproduces the published TIMI (UA/NSTEMI) score, validated for 14-day composite event risk (death / MI / urgent revascularisation) in UA / NSTEMI.
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