title: Coexistent narrow and wide QRS complex tachycardia: an interesting duo.
authors.affiliation: Harvard-Thorndike Electrophysiology Institute, Beth Israel Hospital, Harvard Medical School, Boston, Massachusetts 02215, USA.
authors.forename: M
authors.initials: M
authors.lastname: Zardini
authors.forename: N G
authors.initials: NG
authors.lastname: Boyle
authors.forename: M E
authors.initials: ME
authors.lastname: Josephson
mesh_terms: D000328:Adult; D004562:Electrocardiography; D006801:Humans; D008297:Male; D013610:Tachycardia / Q000503:physiopathology*