title: Alternating wide and narrow QRS complex tachycardias: what is the mechanism?
authors.affiliation: Division of Cardiology, Department of Medicine, National Yang-Ming University, School of Medicine, and Taipei Veterans General Hospital, Taiwan.
authors.forename: Bien-Hsien
authors.initials: BH
authors.lastname: Huang
authors.forename: Ching-Tai
authors.initials: CT
authors.lastname: Tai
authors.forename: Yenn-Jiang
authors.initials: YJ
authors.lastname: Lin
authors.forename: Shih-Ann
authors.initials: SA
authors.lastname: Chen
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D004562:Electrocardiography; D022062:Electrophysiologic Techniques, Cardiac; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male; D011226:Pre-Excitation Syndromes / Q000175:diagnosis / Q000503:physiopathology; D013611:Tachycardia, Atrioventricular Nodal Reentry / Q000175:diagnosis* / Q000503:physiopathology*; D017180:Tachycardia, Ventricular / Q000175:diagnosis* / Q000503:physiopathology*