title: Estimating severity of aortic regurgitation with Doppler techniques.
authors.forename: T J
authors.initials: TJ
authors.lastname: Ryan
mesh_terms: D001011:Aorta / Q000503:physiopathology; D001022:Aortic Valve Insufficiency / Q000175:diagnosis*; D001794:Blood Pressure / Q000502:physiology; D015150:Echocardiography, Doppler; D006801:Humans