title: [P-wave changes in the esophageal ECG lead before and after mitral commissurotomy].
mesh_terms: D004562:Electrocardiography; D006321:Heart / Q000503:physiopathology*; D006801:Humans; D008946:Mitral Valve Stenosis / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery*; D013997:Time Factors
vernacular_title: Izmenenie zubtsa P v pishchevodnykh otvedeniiakh EKG do i posle mitral'noĭ komissurotomii.