TIMI Score for STEMI
Select each clinical variable to compute the TIMI risk score and approximate short-term mortality.
TIMI STEMI score
0
Risk interpretation
Low risk (Score 0–2)
Estimated 30-day mortality ≈1%
How to Use This Calculator
Collect admission variables
Record age, vital signs, time from symptom onset, Killip class, and clinical history when evaluating STEMI patients.
Select applicable criteria
Each variable adds weighted points to the total TIMI score.
Use the score to stratify risk
Higher scores identify patients who may need more aggressive reperfusion strategy, hemodynamic monitoring, and adjunct pharmacotherapy.
Formula
TIMI STEMI score = Age points (0 for <65, 2 for 65–74, 3 for ≥75) +1 (history of diabetes/HTN/angina) +3 (SBP <100 mmHg) +2 (HR >100 bpm) +2 (Killip II–IV) +1 (weight <67 kg) +1 (anterior ST elevation or new LBBB) +1 (time to treatment >4 hours).
Full Description
The TIMI risk score for STEMI predicts 30-day mortality following acute ST-elevation myocardial infarction. It incorporates demographic, hemodynamic, and ischemic burden variables available at first medical contact. Clinicians use the score to benchmark risk, counsel patients, and tailor reperfusion strategies and ancillary therapies.
Frequently Asked Questions
Does primary PCI vs thrombolysis affect the score?
The score estimates baseline risk independent of reperfusion modality, but high-risk patients often benefit from early invasive strategies.
Should renal function or biomarkers be added?
Renal function and biomarker elevations further refine risk but are not part of the original TIMI STEMI score.
How does the score compare with GRACE?
GRACE provides continuous risk estimates but requires more variables. TIMI is simpler and widely used at the bedside.
What if symptom onset is uncertain?
Use best clinical estimate. Delayed presentation (>4 h) increases risk due to prolonged ischemia.