title: Frequency of myxomatous degeneration of the aortic valve as a cause of isolated aortic regurgitation severe enough to warrant aortic valve replacement.
mesh_terms: D000328:Adult; D001021:Aortic Valve / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D001022:Aortic Valve Insufficiency / Q000209:etiology / Q000378:metabolism / Q000473:pathology*; D004452:Echocardiography; D005260:Female; D006025:Glycosaminoglycans / Q000378:metabolism*; D006801:Humans; D008297:Male; D008875:Middle Aged
chemical_list: D006025:Glycosaminoglycans