title: Ptolonged PR index in rheumatic fever.
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D002648:Child; D004562:Electrocardiography; D006321:Heart / Q000503:physiopathology*; D006801:Humans; D012213:Rheumatic Fever / Q000503:physiopathology*; D012214:Rheumatic Heart Disease / Q000175:diagnosis / Q000503:physiopathology