STS Score (Aortic or Mitral or Combined) Calculator

STS Score (Aortic/Mitral/Combined): Explanation and Clinical Context The Society of Thoracic Surgeons (STS) risk score is a validated tool to predict operative mortality and morbidity for patients undergoing cardiac surgery, including aortic valve replacement, mitral valve surgery, or combined procedures. The score incorporates multiple patient-specific variables such as age, sex, NYHA class, left ventricular ejection fraction (EF), creatinine level, diabetes status, prior cardiac surgery, and operative priority to estimate perioperative risk. Predicted risk helps clinicians in preoperative counseling, risk stratification, and decision-making for surgical versus transcatheter interventions.

While this calculator provides an approximate STS score using a simplified logistic model, exact risk calculation requires the official STS Adult Cardiac Surgery Risk Calculator, which includes over 40 variables for precise risk estimation.