title: Explain the change in PR Interval and bundle branch block pattern with comparably coupled atrial premature beats.
authors.affiliation: Department of Medicine, Hospital of the University of Pennsylvania, Philadelphia, USA.
authors.forename: B B
authors.initials: BB
authors.lastname: Pavri
authors.forename: K L
authors.initials: KL
authors.lastname: Wong
authors.forename: D Z
authors.initials: DZ
authors.lastname: Kocovic
authors.forename: M B
authors.initials: MB
authors.lastname: Simson
mesh_terms: D018880:Atrial Premature Complexes / Q000175:diagnosis / Q000503:physiopathology*; D002037:Bundle-Branch Block / Q000175:diagnosis / Q000503:physiopathology*; D004562:Electrocardiography; D006339:Heart Rate / Q000502:physiology; D006801:Humans