We report the fracture of the poppet of a Lillehei-Kaster prosthesis. A 40 years old man was operated upon for endocarditis of the mitral valve. A Lillehei-Kaster tilting disc valve was implanted. Three years later the disc fractured and the two parts escaped in the aorto-iliac axis. Emergency surgical procedure permitted implantation of a Wessex bioprosthesis and removal of the fragments with good results.
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