title: [Electrocardiographic changes in stenosis of the left ostium venosum in children and adolescents before and after mitral commissurotomy].
mesh_terms: D000293:Adolescent; D002648:Child; D004562:Electrocardiography; D006321:Heart / Q000503:physiopathology; D006801:Humans; D008946:Mitral Valve Stenosis / Q000503:physiopathology / Q000601:surgery*
vernacular_title: Elektrokardiograficheskie izmeneniia pri stenoze levogo venoznogo ust'ia v detskom i iunosheskom vozraste do i posle mitral'noĭ komissurotomii.