From January 2007 to September 2011, a total of 211 patients were enrolled into this prospective, international, multi- center nonrandomized study. Participants were im- planted with the Perceval sutureless bioprosthesis at 2 participating European investigational sites; Institut Mutualiste Montsouris (Paris, France) and Medizinische Hochschule Hannover (Hannover, Germany). Inclusion and exclusion criteria are listed in Table 1.