title: A narrow and two wide QRS complex tachycardias: what are the mechanisms?
authors.affiliation: New England Cardiac Arrhythmia Center, New England Medical Center, Tufts University School of Medicine, Boston, Massachusetts 02111, USA.
authors.forename: John P
authors.initials: JP
authors.lastname: Marenco
authors.forename: Craig
authors.initials: C
authors.lastname: Swygman
authors.forename: N A Mark
authors.initials: NA
authors.lastname: Estes
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D013610:Tachycardia / Q000175:diagnosis* / Q000503:physiopathology