A Carpentier-Edwards porcine-valved dacron conduit: at twenty-five years.

We report the longest duration of implantation of a porcine bioprosthesis in the English language literature--a Carpentier-Edwards valved conduit excised after twenty-five years. This 50-year-old man had undergone a modified Fontan operation for tricuspid atresia. He presented with progressive dyspnea, fatigue and edema.