Prospective, randomized, controlled trial of transeptal, transcatheter mitral valve-in-valve versus redo surgical mitral valve replacement.
After multidisciplinary, heart team discussion, patients meeting inclusion criteria will be randomized 1:1 to receive either transcatheter, transeptal mitral valve-in-valve replacement (TsMViV) with the SAPIEN 3 transcatheter heart valve (THV) or redo, mitral valve replacement with 3 commercially available surgical bioprosthetic valves. A sub-randomization in the surgical group will define which bioprosthetic valve will be used. Patients will be seen for follow-up visits at discharge, 30 days, 6 months and annually through 10 years.

