Calculation of valve areas.
D001021:Aortic Valve / Q000503:physiopathology; D001024:Aortic Valve Stenosis / Q000503:physiopathology*; D002302:Cardiac Output; D006439:Hemodynamics; D006801:Humans; D008943:Mitral Valve / Q000503:physiopathology; D008946:Mitral Valve Stenosis / Q000503:physiopathology*; D009200:Myocardial Contraction; D012212:Rheology