Midterm Outcomes for Valve-in-Valve Transcatheter Aortic Valve Replacement in the Failed Freestyle Bioprosthesis.

Background: Valve-in-valve (ViV) transcatheter aortic valve replacement (TAVR) is acceptable in patients at high risk for reoperation. Studies suggest that ViV TAVR in stentless valves may be technically more challenging. This study sought to evaluate midterm outcomes for ViV TAVR in the degenerative Freestyle ((Medtronic, Minneapolis, MN)) stentless bioprosthesis.