title: Wide QRS tachycardia: what is the rhythm?
abstract: We report a case of an elderly man who presented to the emergency room complaining of palpitations. Electrocardiogram revealed wide QRS tachycardia with a narrow beat within the tachycardia. Most commonly, a narrow complex beat during a wide complex tachycardia suggests a capture or fusion beat in the setting of ventricular tachycardia. However, there are situations where supraventricular tachycardia can also manifest this way. In our patient a pacemaker interrogation clarified the diagnosis.
authors.affiliation: Beth Israel Medical Center, University Hospital and Manhattan Campus for the Albert Einstein College of Medicine, New York, NY 10003, USA. jrosman@bethisraelny.org
authors.forename: Jonathan
authors.initials: J
authors.lastname: Rosman
authors.forename: Joseph
authors.initials: J
authors.lastname: Tawil
authors.forename: Sam
authors.initials: S
authors.lastname: Hanon
authors.forename: Paul
authors.initials: P
authors.lastname: Schweitzer
mesh_terms: D000369:Aged, 80 and over; D002037:Bundle-Branch Block / Q000175:diagnosis*; D003937:Diagnosis, Differential; D004562:Electrocardiography; D006801:Humans; D008297:Male; D013617:Tachycardia, Supraventricular / Q000175:diagnosis*