TIMI Risk Score NSTEMI Calculator

TIMI Risk Score NSTEMI Calculator for Cardiology. A higher total reflected higher event rates in the original trial populations. Those percentages are not current individualized mortality estimates and are not interchangeable with a discharge pathway.

For shared guidance on choosing a tool and documenting results, read the clinical calculator workflow.

How this calculator works

The historical UA/NSTEMI TIMI score adds seven binary predictors. Its original outcome combined death, myocardial infarction and urgent revascularization over 14 days.

When to use this calculator

For understanding risk stratification in an established acute-coronary-syndrome assessment, not for diagnosing infarction or excluding ACS in undifferentiated chest pain.

Inputs used

  • Age 65 years or older
  • At least three coronary artery disease risk factors
  • Known coronary stenosis
  • Recent aspirin use
  • Severe recent angina
  • ST-segment deviation
  • Positive cardiac biomarkers

Clinical interpretation

A higher total reflected higher event rates in the original trial populations. Those percentages are not current individualized mortality estimates and are not interchangeable with a discharge pathway.

Worked example

Age criterion, at least three coronary risk factors, aspirin use in the preceding seven days, recurrent angina criterion and elevated biomarkers give 5 points when the other two criteria are absent.

Limitations and safety notes

The score predates contemporary high-sensitivity troponin and treatment practice. Myocardial injury has causes other than infarction; biomarker positivity alone does not establish NSTEMI.

Frequently asked questions

Does score 0 rule out ACS?

No. Diagnostic evaluation and the applicable serial troponin pathway remain necessary.

Does a high score automatically select a GP IIb/IIIa inhibitor?

No. Contemporary treatment decisions cannot be inferred from a historical risk-stratum benefit claim.

References

  • Antman EM et al. The TIMI risk score for unstable angina/non-ST elevation MI. 2000. PMID: 10938172. https://pubmed.ncbi.nlm.nih.gov/10938172/
  • ACC/AHA/ACEP/NAEMSP/SCAI. Acute Coronary Syndromes Guideline. 2025. https://www.acc.org/Guidelines/Guidelines/2025/02/27/17/21/Acute-Coronary-Syndromes-2025

Editorial review and citation methodology

Maintained by the Quick Medical Calculator Editorial Team. Content record date: September 7, 2026. A content date is not evidence of independent clinical review. Individual clinical sign-off is not recorded on this page.

  • Prefer original validation studies for scoring systems and prediction tools.
  • Use current specialty society guidance, transplant allocation policy, public health guidance, or regulator resources when they govern clinical use.
  • Include limitations and safety notes when a calculator is population-specific, context-dependent, or unsuitable as a standalone decision tool.

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