Background: A severe prosthesis-patient mismatch (PPM) is associated with adverse outcomes following transcatheter aortic valve replacement (TAVR) for de novo aortic stenosis or a failed surgical bioprosthesis. The impact of severe PPM in patients undergoing TAV-in-TAVR is unknown.
Aim: We sought to investigate the incidence and 1-year outcomes of different grades of PPM in patients undergoing TAV-in-TAVR.
Materials and methods: The TRANSIT-PPM is an international registry, including cases of degenerated TAVR treated with a second TAVR. PPM severity, as well as in-hospital, 30-day, and 1-year outcomes were defined according to the Valve Academic Research Consortium-3 (VARC-3) criteria.
Results: Among 28 centers, 155 patients were included. Severe PPM was found in 6.5% of patients, whereas moderate PPM was found in 14.2% of patients. The rate of severe PPM was higher in patients who underwent TAV-in-TAVR with a second supra-annular self-expanding (S-SE) TAVR (10%, p = 0.04). Specifically, the rate of severe PPM was significantly higher among cases of a SE TAVR implanted into a balloon-expandable (BE) device (19%, p = 0.003). At 1-year follow-up, the rate of all-cause mortality, and the rate of patients in the New York Heart Association (NYHA) class III/IV were significantly higher in the cohort of patients with severe PPM (p = 0.016 and p = 0.0001, respectively). Almost all the patients with a severe PPM after the first TAVR had a failed < 23 mm BE transcatheter heart valve (THV): the treatment with an S-SE resolved the severe PPM in the majority of the cases.
Conclusion: After TAV-in-TAVR, in a fifth of the cases, a moderate or severe PPM occurred. A severe PPM is associated with an increased 1-year all-cause mortality.
Clinical trial registration: [https://clinicaltrials.gov], identifier [NCT04500964].
Keywords: TAVR; TAVR in TAVR; failed TAVR; mortality; prosthesis-patient mismatch.
Copyright © 2022 Testa, Casenghi, Criscione, Van Mieghem, Tchétché, Asgar, De Backer, Latib, Reimers, Stefanini, Trani, Giannini, Bartorelli, Wojakowski, Dabrowski, Jagielak, Banning, Kharbanda, Moreno, Schofer, Brinkmann, van Royen, Pinto, Serra, Segev, Giordano, Brambilla, Agnifili, Rubbio, Squillace, Oreglia, Tanja, McCabe, Abizaid, Voskuil, Teles, Zoccai, Sondergaard and Bedogni.