title: The calculation of the mean pressure gradient in aortic valvular stenosis: a simplified approach.
mesh_terms: D001021:Aortic Valve / Q000503:physiopathology*; D001024:Aortic Valve Stenosis / Q000503:physiopathology*; D001794:Blood Pressure; D006334:Heart Function Tests / Q000379:methods*; D006339:Heart Rate; D006801:Humans; D008433:Mathematics