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.
Reference:
Grigioni F, Clavel M-A, Vanoverschelde J-L, et al.
The MIDA Mortality Risk Score: development and validation of a prognostic model for early and late death in degenerative mitral regurgitation. Eur Heart J. 2018;39(15):1281–1291. doi:10.1093/eurheartj/ehx465
Lee SP, et al. Supplementary methods reproducing original point assignment:
age ≥65 (3), symptoms (3), AF (1), LVEF ≤60% (1), LVESD ≥40 mm (1), LA diameter ≥55 mm (1), PASP >50 mmHg (2).