title: Letter: Opening snap in mitral stenosis.
mesh_terms: D004452:Echocardiography; D006326:Heart Auscultation; D006347:Heart Sounds; D006801:Humans; D007702:Kinetocardiography; D008943:Mitral Valve / Q000503:physiopathology*; D008946:Mitral Valve Stenosis / Q000503:physiopathology*; D010701:Phonocardiography