Spontaneous alternans in Brugada ECG morphology.
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.
Fazelifar
Amir Farjam
AF
Department of Pacemaker and Electrophysiology, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran. fazelifar@rhc.ac.ir
Haghjoo
Majid
M
Arya
Arash
A
Kazemi
Babak
B
Bagherzadeh
Ataollah
A
Nikoo
Mohammad Hosein
MH
Sadr-Ameli
Mohammad Ali
MA
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