title: Alternating bundle branch block during atrial bigeminy.
authors.affiliation: Florida Heart Rhythm Institute, Tampa, Florida, USA. ssbarold@aol.com
authors.forename: S Serge
authors.initials: SS
authors.lastname: Barold
authors.forename: Bengt
authors.initials: B
authors.lastname: Herweg
mesh_terms: D000200:Action Potentials; D018880:Atrial Premature Complexes / Q000175:diagnosis / Q000503:physiopathology*; D002036:Bundle of His / Q000503:physiopathology*; D002037:Bundle-Branch Block / Q000175:diagnosis / Q000503:physiopathology*; D004562:Electrocardiography; D005260:Female; D006801:Humans; D012032:Refractory Period, Electrophysiological; D013997:Time Factors; D055815:Young Adult