title: Spontaneous alternans in Brugada ECG morphology.
abstract: A 23-year-old man presented with sick sinus syndrome and Brugada-like ECG pattern. Coved type ECG (type 1) converted to saddleback configuration (type 2) when R-R interval decreased and it changed to coved type pattern with increasing R-R cycle length. During stable heart rate, there was no change in Brugada ECG pattern. The R-R interval effect on these patterns can be explained by intensity or kinetics of ion currents and autonomic tone.
authors.affiliation: Department of Pacemaker and Electrophysiology, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran. fazelifar@rhc.ac.ir
authors.forename: Amir Farjam
authors.initials: AF
authors.lastname: Fazelifar
authors.forename: Majid
authors.initials: M
authors.lastname: Haghjoo
authors.forename: Arash
authors.initials: A
authors.lastname: Arya
authors.forename: Babak
authors.initials: B
authors.lastname: Kazemi
authors.forename: Ataollah
authors.initials: A
authors.lastname: Bagherzadeh
authors.forename: Mohammad Hosein
authors.initials: MH
authors.lastname: Nikoo
authors.forename: Mohammad Ali
authors.initials: MA
authors.lastname: Sadr-Ameli
mesh_terms: D000328:Adult; D053840:Brugada Syndrome / Q000175:diagnosis* / Q000503:physiopathology / Q000628:therapy*; D004562:Electrocardiography; D004868:Equipment Failure; D006801:Humans; D008297:Male; D010138:Pacemaker, Artificial; D012804:Sick Sinus Syndrome / Q000503:physiopathology / Q000628:therapy