title: Serial echocardiographic evaluation of left ventricular function in valvular disease, including reproducibility guidelines for serial studies.
mesh_terms: D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D001024:Aortic Valve Stenosis / Q000175:diagnosis*; D004452:Echocardiography; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008875:Middle Aged; D008944:Mitral Valve Insufficiency / Q000175:diagnosis*; D011336:Probability