title: Cycle length-dependent repolarization changes during atrial fibrillation in the Brugada syndrome.
abstract: This is a case report of a patient with Brugada syndrome who developed paroxysmal atrial fibrillation. During the episode, beat-to-beat changes in ventricular repolarization were observed. These changes were a paradoxical ST-segment alteration after a short-coupled ventricular beat. These findings, not reported before, may be helpful for the diagnosis of this syndrome.
authors.affiliation: Department of Electrocardiography and Cardiac Electrophysiology, Instituto Nacional de Cardiología "Ignacio Chávez," Funsalud Mexico City, Mexico.
authors.forename: Manlio F
authors.initials: MF
authors.lastname: Márquez
authors.forename: Gustavo
authors.initials: G
authors.lastname: Medrano
authors.forename: Robert
authors.initials: R
authors.lastname: Frank
authors.forename: Guy
authors.initials: G
authors.lastname: Fontaine
authors.forename: Antonio G
authors.initials: AG
authors.lastname: Hermosillo
authors.forename: Manuel
authors.initials: M
authors.lastname: Cárdenas
mesh_terms: D001281:Atrial Fibrillation / Q000209:etiology* / Q000503:physiopathology*; D002037:Bundle-Branch Block / Q000150:complications*; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology; D006339:Heart Rate; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D013577:Syndrome; D013614:Tachycardia, Paroxysmal / Q000209:etiology* / Q000503:physiopathology*