Acute in vivo evaluation of a new stentless mitral valve

Both configurations of this newly designed stentless mitral bioprosthesis, which preserves annular-papillary muscle continuity using different novel surgical implantation techniques, demonstrated reliable valve performance, with low transvalvular pressure gradients, minimal regurgitation, and acutely preserved postimplant left ventricular function. Further chronic study is needed to verify these results and evaluate reliability of implantation procedures, biocompatibility, and durability.