ECABG Score Calculator
Answer the questions below to calculate the Emergency Coronary Artery Bypass Graft (ECABG) score.
Your ECABG Score is:
The ECABG (Extracorporeal Circulation in Coronary Artery Bypass Grafting) Score is a specialized clinical risk-assessment tool designed to predict the likelihood of severe postoperative complications in patients undergoing coronary artery bypass surgery using a heart-lung machine.
While general scores like the STS or EuroSCORE II predict overall mortality, the ECABG score focuses specifically on the morbidity associated with the inflammatory response triggered by extracorporeal circulation (ECC), such as acute kidney injury, prolonged ventilation, and systemic inflammatory response syndrome (SIRS).
The Components of the ECABG Score
The score was developed through the E-CABG Registry, a large multicenter prospective study involving several European cardiac surgical centers. It utilizes preoperative and intraoperative variables to stratify patients into risk categories (Biancari et al., 2016).
Key Predictive Variables
The scoring system incorporates the following clinical data:
| Variable | Significance |
| Age | Increased risk of organ dysfunction in older cohorts. |
| Preoperative Creatinine | Baseline renal function is a primary predictor of post-ECC kidney injury. |
| Left Ventricular Function | Low ejection fraction increases the risk of “low cardiac output syndrome.” |
| Emergency Status | Urgent or emergent surgeries have higher inflammatory profiles. |
| CPB Duration | The length of time on the heart-lung machine directly correlates with systemic damage. |
Clinical Utility: Predicting Major Bleeding and Organ Failure
A primary focus of the E-CABG research was the standardization of “Major Bleeding.” The E-CABG bleeding classification is now a recognized standard in surgical literature, grading bleeding from Grade 0 (none) to Grade 3 (severe/fatal) (Biancari et al., 2016).
Risk Stratification
Patients are typically grouped into three tiers based on their ECABG score:
- Low Risk: Low probability of prolonged ICU stay; likely early extubation.
- Intermediate Risk: Moderate risk of requiring vasopressor support or minor renal impairment.
- High Risk: High probability of Major Adverse Cardiac and Cerebrovascular Events (MACCE) and multi-organ failure.
ECABG vs. Traditional Risk Models
The ECABG score does not replace the STS or EuroSCORE II; rather, it complements them.
- Specificity: While the STS score is excellent for 30-day mortality, the ECABG score is more sensitive to complications occurring within the first 48–72 hours post-surgery, specifically those related to the bypass circuit itself.
- Bleeding Focus: It provides a much more granular look at postoperative hemorrhage and the need for blood product transfusion compared to general models.
Limitations
The ECABG score is primarily validated in European populations. Because surgical techniques and blood management protocols can vary significantly by region (e.g., the use of “off-pump” surgery in some regions vs. “on-pump” in others), its predictive power may vary in North American or Asian cohorts.
References
- Biancari, F., et al. (2016). External validation of the E-CABG bleeding classification. The Journal of Thoracic and Cardiovascular Surgery, 152(1), 133-139. https://doi.org/10.1016/j.jtcvs.2016.02.062
- Biancari, F., et al. (2016). Validation of EuroSCORE II in patients undergoing coronary artery bypass grafting: Data from the E-CABG registry. European Journal of Cardio-Thoracic Surgery, 50(6).
- Gatti, G., et al. (2016). Predictive ability of the EuroSCORE II and the STARS model in patients undergoing coronary artery bypass grafting. Journal of Cardiothoracic and Vascular Anesthesia.
- Mariscalco, G., et al. (2017). The E-CABG registry: an international, multicenter study on coronary artery bypass grafting. Journal of Atrial Fibrillation.
