TIMI Score for UA/NSTEMI Calculator
Calculate the TIMI UA/NSTEMI score as a bedside prognostic summary using the original 14-day composite event framework.
TIMI Score for STEMI Calculator
Calculate the TIMI STEMI score as a bedside prognostic summary using the original fibrinolytic-era 30-day mortality framework.
⚠️ Medical Disclaimer: The TIMI Score for STEMI predicts 30-day mortality in ST-elevation myocardial infarction patients receiving fibrinolytic therapy. It is a prognostic tool, not a treatment algorithm. Reperfusion decisions should be based on guidelines and clinical context.
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TIMI STEMI Score
0
30-Day Mortality: 0.8%
Very Low risk
Age
+0
DM/HTN/Angina
+0
SBP <100
+0
HR >100
+0
Killip Class
+0
Weight <67 kg
+0
Anterior STE/LBBB
+0
Time to Tx >4h
+0
TIMI STEMI Score⧉
0 / 14
Very Low
30-Day Mortality⧉
0.8%
Based on the original fibrinolytic derivation cohort
Risk Factors⧉
0
Active contributing factors
Killip Class⧉
I
Heart failure classification
Original Use Case⧉
Fibrinolytic-era STEMI prognosis
The mortality calibration comes from the original STEMI fibrinolysis cohort
Use in Practice⧉
Bedside risk summary
Do not use the score itself as a reperfusion or ICU-order algorithm
| Score | 30-Day Mortality | Risk Level |
|---|---|---|
| 0 | 0.8% | Very Low |
| 1 | 1.6% | Low |
| 2 | 2.2% | Low |
| 3 | 4.4% | Moderate |
| 4 | 7.3% | Moderate |
| 5 | 12.4% | Significant |
| 6 | 16.1% | Significant |
| 7 | 23.4% | High |
| ≥8 | 35.9% | Very High |
| Variable | Criteria | Points |
|---|---|---|
| Age 65-74 | — | 2 |
| Age ≥75 | — | 3 |
| DM / HTN / Angina | Any present | 1 |
| SBP <100 | Hypotension | 3 |
| HR >100 | Tachycardia | 2 |
| Killip II-IV | Heart failure | 2-4 |
| Weight <67 kg | Low body mass | 1 |
| Anterior STE / LBBB | High-risk ECG | 1 |
| Time to Rx >4h | Delayed reperfusion | 1 |
Planning notes, formulas, and examples
About the TIMI Score for STEMI Calculator
The TIMI Risk Score for STEMI is a bedside clinical score developed from the original fibrinolytic-treated STEMI cohort to estimate 30-day mortality risk at presentation. It combines age, comorbidity burden, hemodynamics, Killip class, body weight, ECG pattern, and delay to treatment into a single total score.
The score is still useful as a compact prognostic summary, but its mortality percentages come from the original derivation setting and should not be treated as perfectly calibrated to modern PCI-era care.
This page should be used as a risk-stratification aid, not as a stand-alone reperfusion, ICU, or mechanical-support decision rule.
When This Page Helps
A STEMI bedside score can be helpful when you want a quick, structured summary of early risk rather than a loose impression. The TIMI score remains familiar and easy to calculate with variables available at presentation.
Its value is prognostic framing. Treatment decisions still depend on guideline-based STEMI care and the broader clinical picture.
How to Use the Inputs
- Confirm that the clinical setting fits STEMI risk stratification.
- Enter the 8 original TIMI STEMI variables.
- Review the total score and the original 30-day mortality framework.
- Interpret the result as a bedside prognosis summary rather than a treatment algorithm.
Formula used
TIMI STEMI Score (0-14):
- Age 65-74 years = 2 points
- Age 75 years or older = 3 points
- Diabetes, hypertension, or prior angina = 1 point
- Systolic blood pressure <100 mmHg = 3 points
- Heart rate >100 bpm = 2 points
- Killip class II-IV = 2-4 points
- Weight <67 kg = 1 point
- Anterior ST elevation or LBBB = 1 point
- Time to treatment >4 hours = 1 pointExample Calculation
Result: TIMI STEMI Score 11
A score of 11 places the patient in a very high-risk band within the original derivation framework. The page is summarizing prognosis, not determining reperfusion strategy by itself.
Tips & Best Practices
- Keep the original derivation setting in mind when quoting mortality percentages.
- Use the score as a prognosis summary, not as a substitute for guideline-based STEMI management.
- Killip class and hemodynamics usually carry the strongest bedside signal.
- Do not overstate the score’s calibration in modern invasive care settings.
- Document the score only if it adds value to the overall clinical summary.
- Interpret the total in context rather than relying on the number alone.
What the Score Is Good For
The TIMI STEMI score is good at summarizing early bedside risk using a small set of readily available variables.
What It Does Not Do
It does not replace current guideline-based STEMI care, and it does not decide cath timing, ICU duration, or mechanical-support use by itself.
Best Use
Use the score as a compact prognostic summary tied to the original STEMI fibrinolysis framework, while keeping modern management decisions anchored in the broader clinical picture.
Sources & Methodology
Last updated:
Methodology
This page applies the original eight-variable TIMI STEMI score exactly as a bedside prognosis tool. It sums the age band, comorbidity, hemodynamic, Killip, body-weight, ECG-territory, and treatment-delay points into the standard 0-to-14 total and then displays the original 30-day mortality framework from the derivation cohort.
The page is intentionally framed as a prognostic summary rather than a reperfusion or ICU-order algorithm. The mortality percentages reflect the original fibrinolytic-era STEMI population and should not be treated as perfectly calibrated to every modern PCI-era setting.
Sources
- TIMI risk score for ST-elevation myocardial infarction: a convenient, bedside, clinical score for risk assessment at presentation (Circulation)
- TIMI Study Group (TIMI Study Group) — Study-group reference for the TIMI family of cardiovascular risk scores.
Frequently Asked Questions
It still works as a practical bedside prognostic summary, but the event percentages come from the original fibrinolytic-era cohort and should not be treated as perfectly calibrated to contemporary STEMI care.
They are different scores for different acute coronary syndrome settings. TIMI STEMI focuses on STEMI prognosis, while TIMI UA/NSTEMI uses a different 7-item framework and a different outcome model.
It is one of the strongest components because clinical heart-failure severity at presentation carries major prognostic weight in STEMI.
Low body weight was a significant predictor in the original derivation cohort and contributes to the total score for that reason.
Both are prognostic tools, but they are not interchangeable. TIMI STEMI is simpler and very bedside-friendly, while GRACE uses a different structure and broader ACS risk framework.
No. Reperfusion strategy should follow current STEMI guidelines and the actual clinical setting. The TIMI score is a prognostic aid, not a stand-alone management rule.
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