title: Repetitive intermittent left bundle branch block.
abstract: A 32-year-old woman with no structural heart disease was referred for evaluation due to daily occasional palpitations and documented left bundle branch block (LBBB) on surface electrocardiogram (EKG). Continuous 24-hour Holter monitoring revealed a broad range of repetitive intermittent LBBB grades with a rate-dependent pattern that was also associated with circadian variations.
authors.affiliation: Cardiac Arrhythmia and Electrophysiology Unit, Department of Cardiology, Complejo Hospitalario De Jaén, Jaén, Spain. maapalomares@secardiologia.es
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Arias
authors.forename: Ana M
authors.initials: AM
authors.lastname: Sánchez
authors.forename: Juana M
authors.initials: JM
authors.lastname: López
mesh_terms: D000328:Adult; D002037:Bundle-Branch Block / Q000145:classification* / Q000175:diagnosis*; D004562:Electrocardiography; D005260:Female; D006801:Humans; D012008:Recurrence