title: [A parallel study of changes in the electrocardiogram ballistocardiogram and phase structure of left ventricular systole in active rheumatism without valve defect formation].
mesh_terms: D000293:Adolescent; D000328:Adult; D001450:Ballistocardiography; D004562:Electrocardiography; D006801:Humans; D012214:Rheumatic Heart Disease / Q000175:diagnosis*; D013997:Time Factors
vernacular_title: Parallel'noe izuchenie izmeneniĭ EKG, ballistokardiogrammy if fazovoĭ struktury sistol levogo zheludochka pri aktivnom revmatizme bez oformlennogo klapannogo poroka.