title: Intermittent spontaneous disc escape and reseating of Björk-Shiley mitral valve prosthesis.
mesh_terms: D000328:Adult; D004868:Equipment Failure; D005260:Female; D006350:Heart Valve Prosthesis / Q000592:standards; D006801:Humans; D008943:Mitral Valve; D008946:Mitral Valve Stenosis / Q000601:surgery