title: Alternating left bundle branch block and right bundle branch block during tachycardia: what is the mechanism?
authors.affiliation: Beth Israel Deaconess Medical Center, Department of Medicine, Boston, Massachusetts 02215, USA. dfrisch@bidmc.harvard.edu
authors.forename: Daniel R
authors.initials: DR
authors.lastname: Frisch
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Zimetbaum
authors.forename: Mark E
authors.initials: ME
authors.lastname: Josephson
mesh_terms: D000368:Aged; D002037:Bundle-Branch Block / Q000209:etiology* / Q000503:physiopathology* / Q000628:therapy; D017115:Catheter Ablation; D004554:Electric Countershock; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate; D006801:Humans; D017180:Tachycardia, Ventricular / Q000150:complications* / Q000503:physiopathology* / Q000601:surgery / Q000628:therapy