The mechanisms of an increased dominant frequency in the left atrial posterior wall during atrial fibrillation in acute atrial dilatation

Journal of Cardiovascular Electrophysiology
Jin-Long HuangShih-Ann Chen

Abstract

Previous studies have shown that the highest dominant frequency (DF) is located in the left atrium (LA) during atrial fibrillation (AF) in pacing-induced AF. However, there have been few studies on the mechanisms of the increased DF of AF during acute atrial dilatation. The purpose of this study was to investigate the mechanisms of the increased maximal DF (max DF) in pacing-induced AF during acute atrial dilatation. In eight Langendorff-perfused canine hearts (26 +/- 2 kg), noncontact balloon catheters were placed into the right atrium (RA) and LA, respectively. AF was induced by extrastimulation pre- and postdilatation in the atrium (0 and 15 cm H(2)O, respectively). Fast Fourier transformation analysis was performed to analyze the max DF and harmonic index (HI) from the bi-atrial unipolar virtual electrograms during AF. The fibrillation cycle lengths were obtained from different atrial sites. The number of wavefronts was analyzed during AF. The frequency of regional splitting was defined as the number of wavefront splits per second in different atrial regions during AF. The percentage of the low-voltage zones (<0.5 mV) was defined as the ratio of the area of the low-voltage zones to the total atrial surface area. The DF was ...Continue Reading

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Citations

Jun 15, 2011·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·Sotirios NediosCharalampos Kriatselis
Oct 12, 2013·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·Yazhou LinMinglong Chen
Feb 27, 2014·Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology·Jedrzej KosiukAndreas Bollmann
Nov 7, 2012·Heart Rhythm : the Official Journal of the Heart Rhythm Society·Arif ElvanMaurits A Allessie
Feb 6, 2007·Heart Rhythm : the Official Journal of the Heart Rhythm Society·Gregory M MarcusJeffrey E Olgin
Jun 8, 2007·Journal of Cardiovascular Electrophysiology·Jane CaldwellStuart M Cobbe
Mar 9, 2007·Journal of Cardiovascular Electrophysiology·Wanwarang WongcharoenShih-Ann Chen
May 3, 2007·Journal of Cardiovascular Electrophysiology·Jason Ng, Jeffrey J Goldberger
Jun 21, 2007·Journal of Cardiovascular Electrophysiology·Jason NgJeffrey J Goldberger
Aug 21, 2013·International Journal of Cardiology·Wen-Chin TsaiYi-Jen Chen
Mar 18, 2015·International Journal of Cardiology·Uğur Canpolat
Jun 28, 2011·Heart Rhythm : the Official Journal of the Heart Rhythm Society·Michael V Orlov
Oct 21, 2016·The Annals of Thoracic Surgery·Christopher P LawranceRalph J Damiano
Apr 23, 2009·The Journal of International Medical Research·Q PanY H Chen
Oct 21, 2009·Circulation. Arrhythmia and Electrophysiology·Arif ElvanJacques M T de Bakker
May 3, 2008·Journal of Applied Physiology·Lei LiangYi-Han Chen
May 12, 2019·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·Iain SimSteven E Williams
Dec 19, 2020·Journal of Arrhythmia·James MannionUsama Boles
Apr 11, 2021·Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology·Fong-Jhih LinYi-Jen Chen

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