title: Grouped beating: to couple into trouble.
abstract: We discuss the 12-lead electrocardiogram and differential diagnosis of a regularly irregular narrow QRS-complex rhythm obtained from a patient with a history of atrial fibrillation who was admitted because of bradycardia-associated symptoms.
authors.affiliation: Heart Rhythm Management Centre, Cardiovascular Centre, Free University of Brussels (UZ Brussel) VUB, Laarbeeklaan 101, 1090 Brussels, Belgium. s.richter@med.uni-frankfurt.de
authors.forename: Sergio
authors.initials: S
authors.lastname: Richter
authors.forename: Andrea
authors.initials: A
authors.lastname: Sarkozy
authors.forename: Carlo
authors.initials: C
authors.lastname: de Asmundis
authors.forename: Gian-Battista
authors.initials: GB
authors.lastname: Chierchia
authors.forename: Pedro
authors.initials: P
authors.lastname: Brugada
mesh_terms: D000368:Aged; D001281:Atrial Fibrillation / Q000175:diagnosis*; D001919:Bradycardia / Q000175:diagnosis*; D003937:Diagnosis, Differential; D004562:Electrocardiography / Q000379:methods*; D006801:Humans; D008297:Male; D013617:Tachycardia, Supraventricular / Q000175:diagnosis*