LVEF-based phenotyping in very old adults hospitalised for heart failure: cardiological discrimination, shared geriatric burden, and treatment gaps - Rémi Esser; Sophie Balesdent; Jennifer Corny; Marine Larbaneix; Alejandro Mondragon; Marlène Esteban; Christine Farges; Marc Harboun; Sophie Nisse Durgeat; Vincenzo Palermo; Olivier Maurou (Frontiers in Cardiovascular Medicine, 2026)