title: Active vs passive rhythms as an explanation of bigeminal rhythm with similar P waves.
abstract: We describe the criteria for differential diagnosis between 3:2 sinoatrial block from atrial bigeminy due to an ectopic focus in the sinus or parasinus zone. In the 3:2 sinoatrial block the RR interval of the basic rhythm is similar to the short R-R interval of the paired rhythm. In atrial bigeminy, the R-R interval of the basic rhythm is similar to the long R-R interval of the paired rhythm.
authors.affiliation: Departamento de Medicina Interna, Universidad Autonoma de Barcelona, Hospital de Sant Pau, Barcelona, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Bayés de Luna
authors.forename: J
authors.initials: J
authors.lastname: Guindo
authors.forename: E
authors.initials: E
authors.lastname: Homs
authors.forename: C
authors.initials: C
authors.lastname: Madoery
authors.forename: R
authors.initials: R
authors.lastname: Lamic
authors.forename: P
authors.initials: P
authors.lastname: Iturralde
mesh_terms: D001283:Atrioventricular Node; D005117:Cardiac Complexes, Premature / Q000175:diagnosis*; D004562:Electrocardiography; D006801:Humans; D012848:Sinoatrial Block / Q000175:diagnosis*