[Malfunction of a mitral bioprosthesis, hemolysis and acute renal insufficiency]

Intravascular hemolysis is a rare complication following valvular replacement, particularly with bioprostheses. It is generally secondary to prosthetic malfunction and is the cause of anemia. We report a rare case of acute renal insufficiency and severe hemolysis caused by malfunction of a bioprosthesis in the mitral position.