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Durability of Transcatheter and Surgical Bioprosthetic Aortic Valves in Patients at Lower Surgical Risk

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BACKGROUND: Transcatheter aortic valve replacement (TAVR) is an alternative to surgical aortic valve replacement (SAVR) in patients with severe aortic stenosis and intermediate or high surgical risk.

OBJECTIVES: The aim of this study was to compare the durability of transcatheter and surgical bioprosthetic aortic valves using standardized criteria.

METHODS: In the NOTION (Nordic Aortic Valve Intervention) trial, all-comer patients with severe aortic stenosis and lower surgical risk for mortality were randomized 1:1 to TAVR (n = 139) or SAVR (n = 135). Moderate/severe structural valve deterioration (SVD) was defined as a mean gradient ≥20 mm Hg, an increase in mean gradient ≥10 mm Hg from 3 months post-procedure, or more than mild intraprosthetic aortic regurgitation (AR) either new or worsening from 3 months post-procedure. Nonstructural valve deterioration (NSVD) was defined as moderate/severe patient-prosthesis mismatch at 3 months or moderate/severe paravalvular leakage. Bioprosthetic valve failure (BVF) was defined as: valve-related death, aortic valve reintervention, or severe hemodynamic SVD.

RESULTS: At 6 years, the rates of all-cause mortality were similar for TAVR (42.5%) and SAVR (37.7%) patients (p = 0.58). The rate of SVD was higher for SAVR than TAVR (24.0% vs. 4.8%; p < 0.001), whereas there were no differences in NSVD (57.8% vs. 54.0%; p = 0.52) or endocarditis (5.9% vs. 5.8%; p = 0.95). BVF rates were similar after SAVR and TAVR through 6 years (6.7% vs. 7.5%; p = 0.89).

CONCLUSIONS: In the NOTION trial through 6 years, SVD was significantly greater for SAVR than TAVR, whereas BVF was low and similar for both groups. Longer-term follow-up of randomized clinical trials will be necessary to confirm these findings. (Nordic Aortic Valve Intervention Trial; NCT01057173).

Original languageEnglish
JournalJournal of the American College of Cardiology
Volume73
Issue number5
Pages (from-to)546-553
Number of pages8
ISSN0735-1097
DOIs
Publication statusPublished - 12 Feb 2019

ID: 58442949