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13.1 Key Points Transcatheter valve implantation is feasible in failing surgical aortic, mitral, pulmonic and tricuspid bioprostheses. Access may be transarterial (femoral, subclavian, axillary), transvenous (femoral, subclavian, jugular), transapical, transatrial, or direct transaortic. Paravalvular regurgitation (PR) must be distinguished from…