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Although transcatheter aortic valve replacement (TAVR) was originally developed for treatment of the native aortic valve, it is also performed for treatment of failing surgical aortic valves (valve-in-valve TAVR). However, high residual transvalvular gradients and patient-prosthesis mismatch are concerns in this setting, as both have been associated with increased long-term mortality. Observational studies suggest that self-expanding supra-annular valves (SEVs) may offer an advantage over balloon-expandable valves (BEVs) in such patients; however, no head-to-head comparisons have been performed.
To address this issue, investigators evaluated hemodynamics based on echocardiography in 98 patients with failing small surgical aortic bioprosthese…