[New treatment methods in heart valve surgery--the Toronto SPV stentless bioprosthesis]

Stentless valves may be an alternative to conventional stented bioprostheses and homografts. From all tissue valves homografts proved to have the best long term results. But homografts are not always available. Stentless bioprostheses are similar to homografts concerning in implantation technique, valve anatomy and physiologic function. The stentless design leads to remodeling of the left ventricle and the aortic root, resulting in a superior hemodynamic profile. Nevertheless long term results are required.