title: [Evaluation of the changes in myocardial contractile function in mitral heart defect patients before and after surgery].
mesh_terms: D000293:Adolescent; D000328:Adult; D001775:Blood Circulation / Q000187:drug effects; D002908:Chronic Disease; D006801:Humans; D008875:Middle Aged; D008946:Mitral Valve Stenosis / Q000503:physiopathology* / Q000601:surgery; D009200:Myocardial Contraction / Q000187:drug effects; D011300:Preoperative Care; D012214:Rheumatic Heart Disease / Q000503:physiopathology / Q000601:surgery
vernacular_title: Otsenka izmeneniĭ sokratitl'e noĭ funktsii miokarda u bol'nykh mitral'nym porokom serdtsa do i posleoperatsii