title: Is it really getting easier to assess mitral regurgitation using the proximal isovelocity surface area?
authors: Stephen H
authors: SH
authors: Little
mesh_terms: D000465:Algorithms; D018618:Echocardiography, Doppler, Color / Q000379:methods*; D019560:Echocardiography, Three-Dimensional / Q000379:methods*; D005260:Female; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008297:Male; D008944:Mitral Valve Insufficiency / Q000000981:diagnostic imaging*