Lexin Wang1, Rongguo Yao. 1. School of Biomedical Sciences, Charles Sturt University, Wagga Wagga, New South Wales, Australia. lwang@csu.edu.au
Abstract
BACKGROUND: The primary purpose of the study was to evaluate long-term clinical results of radiofrequency catheter ablation of accessory pathway-mediated tachycardia. METHODS: Catheter ablation was performed in 321 patients who were subsequently followed up for an average of 36 months. RESULTS: Accessory pathway-mediated tachycardia was abolished by catheter ablation in 308 patients (96%). Right free wall (10.6%) and right posteroseptal (14.9%) accessory pathway was associated with higher failure rate than left-sided pathways (2.3%, p<0.01). Atrioventricular block occurred in two patients during ablation of anteroseptal pathway. Recurrence of accessory pathway conduction occurred in 13 (4.1%) patients, principally within the first 4 weeks after ablation procedure. Recurrence in right free wall (12.8%) or right posteroseptal (14.2%) pathways was higher than in left-sided pathways (1.8%, p<0.01). CONCLUSIONS: Radiofrequency catheter ablation has high immediate success rate and long-term recurrence of accessory pathway conduction or tachycardia. Right free wall or right posteroseptal pathways are associated with higher incidence of initial ablation failure and short- to medium-term recurrence.
BACKGROUND: The primary purpose of the study was to evaluate long-term clinical results of radiofrequency catheter ablation of accessory pathway-mediated tachycardia. METHODS: Catheter ablation was performed in 321 patients who were subsequently followed up for an average of 36 months. RESULTS: Accessory pathway-mediated tachycardia was abolished by catheter ablation in 308 patients (96%). Right free wall (10.6%) and right posteroseptal (14.9%) accessory pathway was associated with higher failure rate than left-sided pathways (2.3%, p<0.01). Atrioventricular block occurred in two patients during ablation of anteroseptal pathway. Recurrence of accessory pathway conduction occurred in 13 (4.1%) patients, principally within the first 4 weeks after ablation procedure. Recurrence in right free wall (12.8%) or right posteroseptal (14.2%) pathways was higher than in left-sided pathways (1.8%, p<0.01). CONCLUSIONS: Radiofrequency catheter ablation has high immediate success rate and long-term recurrence of accessory pathway conduction or tachycardia. Right free wall or right posteroseptal pathways are associated with higher incidence of initial ablation failure and short- to medium-term recurrence.
Authors: Tom Wong; Wajid Hussain; Vias Markides; Diana A Gorog; Ian Wright; Nicholas S Peters; D Wyn Davies Journal: J Interv Card Electrophysiol Date: 2006-11-18 Impact factor: 1.900
Authors: George F Van Hare; Harold Javitz; Dorit Carmelli; J Philip Saul; Ronn E Tanel; Peter S Fischbach; Ronald J Kanter; Michael Schaffer; Ann Dunnigan; Steven Colan; Gerald Serwer Journal: Heart Rhythm Date: 2004-07 Impact factor: 6.343