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ion model.Background Valve-in-valve transcatheter aortic valve implantation (TAVI) has emerged as a treatment for aortic bioprosthesis failure in case of prohibitive risk for redo surgery. However, clinical evaluation of valve-in-valve TAVI remains limited by the number of patients analysed. Aim To evaluate outcomes of valve-in-valve TAVI compared with native aortic valve TAVI at a nationwide level in France. Methods Based on the French administrative hospital discharge database, the study collected information for all consecutive patie