MIDA Mortality Risk (Degenerative MR Surgery) Calculator

MIDA Mortality Risk (Degenerative MR Surgery): Explanation and Clinical Context The MIDA Mortality Risk Score is a validated prognostic model derived from the Multicenter International Database on Mitral Valve Regurgitation (MIDA) registry. It uses seven clinical and echocardiographic parameters — age, symptoms, atrial fibrillation, left ventricular ejection fraction (LVEF), LV end-systolic diameter (LVESD), left atrial (LA) diameter, and pulmonary artery systolic pressure (PASP) — to stratify mortality risk in degenerative mitral regurgitation (DMR). The score ranges from 0 to 12 points, with higher scores predicting increased early and late mortality after diagnosis and surgery.

In the original publication, postoperative one-year mortality was approximately 1% for score 0, 7% for scores 7–8, and 14% for scores 11–12. The MIDA score assists clinicians in risk stratification, surgical timing, and patient counseling but does not replace operative risk models such as EuroSCORE II or STS. It provides DMR-specific context for shared decision-making.