title: Author's response.
authors.affiliation: University of Iowa, Cardiac Electrophysiology, 200 Hawkins Drive, 4426A JCP, Iowa City, IA 52242, USA. giudici53@gmail.com
authors.forename: Michael
authors.initials: M
authors.lastname: Giudici
mesh_terms: D002037:Bundle-Branch Block / Q000175:diagnosis* / Q000628:therapy*; D058406:Cardiac Resynchronization Therapy / Q000379:methods*; D004562:Electrocardiography / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D018487:Ventricular Dysfunction, Left / Q000175:diagnosis* / Q000628:therapy*