title: [Ultrasonic method of studying the heart in healthy persons and in mitral defect patients].
mesh_terms: D000328:Adult; D001145:Arrhythmias, Cardiac / Q000503:physiopathology; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000502:physiology*; D006334:Heart Function Tests / Q000295:instrumentation; D006801:Humans; D008297:Male; D008875:Middle Aged; D008946:Mitral Valve Stenosis / Q000503:physiopathology* / Q000601:surgery; D010701:Phonocardiography; D014463:Ultrasonography
vernacular_title: Ul'trazvukovoĭ metod issledovaniia serdtsa u zdorovykh lits i u bol'nykh s mitral'nym porokom