What Is EuroSCORE II?
EuroSCORE II (European System for Cardiac Operative Risk Evaluation) is a logistic regression model that estimates the risk of in-hospital mortality following cardiac surgery. Originally developed from European surgical data, it has been validated across multiple populations worldwide.
How EuroSCORE II Is Calculated
The model uses 18 risk factors across three categories:
Patient Factors
- Age, gender, renal function (creatinine clearance)
- Extracardiac arteriopathy, poor mobility
- Previous cardiac surgery, chronic lung disease
- Active endocarditis, critical preoperative state
- Diabetes on insulin
Cardiac Factors
- NYHA class, CCS class 4 angina
- Left ventricular function
- Recent myocardial infarction
- Pulmonary hypertension
Operative Factors
- Urgency of operation
- Weight of the intervention (isolated CABG, single valve, etc.)
- Surgery on the thoracic aorta
EuroSCORE II vs. STS: Key Differences
| Feature | STS-PROM | EuroSCORE II |
|---|---|---|
| Population | North American | European (validated globally) |
| Variables | ~40-60 | 18 |
| Procedure specificity | Separate models per procedure | Single model, all procedures |
| Outcomes predicted | Mortality + morbidity (stroke, renal, etc.) | Mortality only |
| Update frequency | Regularly updated | Last updated 2012 |
Why Both Models Matter
When STS and EuroSCORE II agree on risk stratification, confidence in the estimate is high. When they diverge significantly, it often points to specific risk factors that one model weights more heavily than the other — and that divergence itself is clinically informative.
WhiteGloveMD calculates both scores for every case, along with the AATS Risk Calculator, providing patients and physicians with a multi-dimensional risk profile rather than a single number.
Calculate your EuroSCORE II and STS scores using our free risk calculator.