Cryoablation in pediatric atrioventricular nodal reentry: electrophysiologic effects on atrioventricular nodal conduction

Heart Rhythm : the Official Journal of the Heart Rhythm Society
Kathryn K CollinsGeorge F Van Hare

Abstract

Cryoablation for treatment of atrioventricular nodal reentrant tachycardia (AVNRT) is safe and efficacious. Information on the effects of cryoablation on atrioventricular (AV) nodal conduction is limited. The purpose of this study was to evaluate the effects of cryoablation on AV nodal conduction in pediatric patients with AVNRT. We retrospectively analyzed electrophysiologic studies before and after successful cryoablation. Patients were divided into two groups: group 1 (n = 22, age 14 +/- 3 years) had baseline discontinuous atrial-to-His interval (AH) conduction curves; and group 2 (n = 13, age 12 +/- 4 years, P = .054) had continuous curves. At baseline, group 1 had longer measurements of maximal AH with A1A2, AV nodal effective refractory period, and AV block cycle length. Postcryoablation, both group 1 and group 2 showed decreases in maximal AH with A1A2 pacing or atrial overdrive pacing and in the finding of PR > or = RR with atrial overdrive pacing (group 1: 55% vs 5%, P < .001; group 2: 69% vs 0%, P < .001). A significant increase in overall AV effective refractory period and a decrease in AV block cycle length were found in group 1 but not group 2. Fifty percent of group 1 patients had complete abolition of slow pathwa...Continue Reading

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Citations

Mar 8, 2008·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·Chadi DibSamuel J Asirvatham
May 2, 2012·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·Tilko ReentsGabriele Hessling
May 15, 2008·Archives of Cardiovascular Diseases·G NadjiG Jarry
Sep 16, 2008·Journal of Electrocardiology·George F Van Hare
Nov 13, 2007·Journal of Electrocardiology·Mathias Alexander EmmelNarayanswami Sreeram
Oct 7, 2008·Pacing and Clinical Electrophysiology : PACE·Nikhil K ChananiKathryn K Collins
Nov 23, 2007·Journal of Cardiovascular Electrophysiology·Kathryn K Collins
Apr 19, 2012·Journal of Cardiovascular Electrophysiology·Lee L L EckhardtCesar Alberte
Sep 6, 2012·Pacing and Clinical Electrophysiology : PACE·Mario VillasenorKathryn K Collins
Feb 27, 2013·Pacing and Clinical Electrophysiology : PACE·Patcharapong Suntharos, Andrew D Blaufox
Jun 10, 2010·Pacing and Clinical Electrophysiology : PACE·Richard J CzosekTimothy K Knilans
Dec 7, 2013·Journal of Cardiovascular Electrophysiology·Fabrizio DragoMonica Prosperi
Oct 2, 2009·Pacing and Clinical Electrophysiology : PACE·Steven B FishbergerAnthony F Rossi
Dec 4, 2009·Pacing and Clinical Electrophysiology : PACE·Fabrizio DragoMaria Teresa Naso Onofrio
May 2, 2006·Heart Rhythm : the Official Journal of the Heart Rhythm Society·Prince J Kannankeril
Feb 28, 2008·Current Opinion in Cardiology·Fabrizio Drago

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