title: [A clinical study of degenerative calcific valvular disease in the elderly].
mesh_terms: D000368:Aged; D001021:Aortic Valve / Q000473:pathology; D002114:Calcinosis / Q000175:diagnosis*; D005260:Female; D006349:Heart Valve Diseases / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000473:pathology