Longterm complications of Beall prosthetic valve: a case report.

A case of malfunctioning Beall prosthetic mitral valve causing severe heart failure is presented. The unusual aspect of this malfunction was the finding of disc dislodgment despite the absence of pathology in the disc itself. The dislodgment was caused by excessive tissue ingrowth around the suture ring. The need for close clinical follow-up of this type of prosthetic valve is emphasized.