title: Alternating left and right bundle branch block.
authors.affiliation: Department of Cardiology, Congenital Heart Diseases and Electrotherapy, Silesian Medical University, Silesian Centre of Heart Diseases, Zabrze, Poland. kas-k2@o2.pl.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Mitręga
authors.forename: Radosław
authors.initials: R
authors.lastname: Lenarczyk
authors.forename: Patrycja
authors.initials: P
authors.lastname: Pruszkowska
authors.forename: Zbigniew
authors.initials: Z
authors.lastname: Kalarus
authors.forename: Beata
authors.initials: B
authors.lastname: Sredniawa
mesh_terms: D002037:Bundle-Branch Block / Q000150:complications / Q000175:diagnosis*; D004562:Electrocardiography; D006329:Heart Conduction System; D006801:Humans; D008297:Male; D008875:Middle Aged; D018487:Ventricular Dysfunction, Left / Q000175:diagnosis* / Q000209:etiology; D018497:Ventricular Dysfunction, Right / Q000175:diagnosis* / Q000209:etiology