title: [Analysis of the P wave prior to and following mitral commissurotomy].
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D004562:Electrocardiography; D005260:Female; D006325:Heart Atria / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D008946:Mitral Valve Stenosis / Q000601:surgery*; D011182:Postoperative Care; D011300:Preoperative Care
vernacular_title: Analiza zalamka P przed i po komisurotomii mitralnej