title: Quantitative estimation of aortic regurgitation by analog computer analysis of radiocardiogram.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001022:Aortic Valve Insufficiency / Q000175:diagnosis* / Q000503:physiopathology; D006328:Cardiac Catheterization; D002306:Cardiac Volume; D003202:Computers, Analog; D006801:Humans; D008433:Mathematics; D008875:Middle Aged; D008954:Models, Biological; D011865:Radioisotope Dilution Technique