title: Alternation of QRS width and cycle length during a long RP' tachycardia: what is the mechanism?
authors.affiliation: Cardiac Electrophysiology Laboratory, University Hospitals of Cleveland/Case Western Reserve University, Cleveland, Ohio.
authors.forename: Anselma
authors.initials: A
authors.lastname: Intini
authors.forename: Bartolomeo
authors.initials: B
authors.lastname: Giannattasio
authors.forename: Niraj
authors.initials: N
authors.lastname: Varma
mesh_terms: D000328:Adult; D018880:Atrial Premature Complexes / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D017115:Catheter Ablation; D004562:Electrocardiography; D005260:Female; D006801:Humans; D013617:Tachycardia, Supraventricular / Q000150:complications / Q000175:diagnosis* / Q000601:surgery