Impact of TAVR Failure Mechanism on Outcomes After Reintervention: From the EXPLANTORREDO-TAVR Registry

BACKGROUND: As transcatheter aortic valve replacement (TAVR) expands to patients with longer life expectancy, the impact of failure mechanisms on outcomes of TAVR-explant and redo-TAVR remains uncertain. We sought to evaluate outcomes of TAVR reintervention based on the failure mechanism of the index transcatheter aortic valve. METHODS: From 2009 to 2022, 553 patients from 29 centers in the EXPLANTORREDO-TAVR registry (Explant or Redo Transcatheter Aortic Valve Replacement) underwent TAVR-explant or redo-TAVR for transcatheter aortic valve failure. Patients with endocarditis were excluded. Patients with structural valve deterioration (SVD, N=224 [64.9%]) were compared with those with nonstructural valve dysfunction (NSVD, N=121 [35.1%]), comprising paravalvular leak (86.0%) and prosthesis-patient mismatch (14.0%). Outcomes were assessed at 30 days and 1 year. RESULTS: Mean age was 75.6±9.3 years, with 42% women. There were no differences in reintervention type between groups (redo-TAVR in 58.0% SVD versus 49.6% NSVD; TAVR-explant: 42.0% versus 50.4%; P =0.14). Compared with NSVD, SVD was the predominant mode of failure in balloon-expandable valves (50.7% versus 24.8%; P