title: Intermittent left bundle branch block.
abstract: Presenting electrocardiograms of intermittent left bundle branch block in a 60-year-old female.
authors.affiliation: Department of Medicine, MedStar Union Memorial Hospital, Baltimore, MD, USA.
authors.forename: Mansoor
authors.initials: M
authors.lastname: Mozayan
authors.forename: Marc
authors.initials: M
authors.lastname: Mugmon
keywords: intermittent rate dependent bundle branch block; propofol induced bradycardia