title: Natural history of chronic valvular disease.
mesh_terms: D000293:Adolescent; D000328:Adult; D001022:Aortic Valve Insufficiency / Q000175:diagnosis; D001024:Aortic Valve Stenosis / Q000175:diagnosis; D002648:Child; D002675:Child, Preschool; D002908:Chronic Disease; D005500:Follow-Up Studies; D006330:Heart Defects, Congenital / Q000175:diagnosis; D006337:Heart Murmurs; D006349:Heart Valve Diseases / Q000175:diagnosis* / Q000473:pathology; D006351:Heart Valves / Q000473:pathology; D006801:Humans; D007223:Infant; D008944:Mitral Valve Insufficiency / Q000175:diagnosis; D008946:Mitral Valve Stenosis / Q000175:diagnosis; D011665:Pulmonary Valve Insufficiency / Q000175:diagnosis; D011666:Pulmonary Valve Stenosis / Q000175:diagnosis; D012214:Rheumatic Heart Disease / Q000175:diagnosis; D014262:Tricuspid Valve Insufficiency / Q000175:diagnosis; D014264:Tricuspid Valve Stenosis / Q000175:diagnosis