The treatment with transcatheter aortic valve implantation (TAVI) of patients with small (≤23mm) surgical bioprostheses remains a challenge due to the increased transvalvular residual gradients and high rates of severe prosthesis-patient mismatch (PPM) following the procedure.
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Rate of prothesis-patient mismatch (PPM) (valve performance)
Timeframe: 30 days
Residual transvalvular gradient
Timeframe: 30 days