title: Stuck prosthetic valve caused by pyrolytic carbon disk wear.
mesh_terms: D000368:Aged; D002244:Carbon / Q000009:adverse effects*; D005260:Female; D006350:Heart Valve Prosthesis / Q000009:adverse effects*; D006801:Humans; D008943:Mitral Valve / Q000601:surgery*
chemical_list: C009139:pyrolytic carbon; D002244:Carbon