title: The clinical significance of the fourth heart sound in aortic stenosis.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001011:Aorta; D001024:Aortic Valve Stenosis / Q000175:diagnosis / Q000503:physiopathology*; D001794:Blood Pressure; D002302:Cardiac Output; D002648:Child; D004395:Dye Dilution Technique; D004562:Electrocardiography; D006321:Heart / Q000000981:diagnostic imaging; D006326:Heart Auscultation; D006801:Humans; D008875:Middle Aged; D010701:Phonocardiography; D011859:Radiography; D012119:Respiration