title: Progression of mitral regurgitation. A prospective Doppler echocardiographic study.
authors.forename: J
authors.initials: J
authors.lastname: Almeida
mesh_terms: D018450:Disease Progression; D015150:Echocardiography, Doppler; D006801:Humans; D008944:Mitral Valve Insufficiency / Q000000981:diagnostic imaging*; D011446:Prospective Studies