{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,30]],"date-time":"2026-10-30T17:24:34Z","timestamp":1793381074695,"version":"4.5.0"},"reference-count":22,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2011,5,13]],"date-time":"2011-05-13T00:00:00Z","timestamp":1305244800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Pacing Clinical Electrophis"],"published-print":{"date-parts":[[2011,8]]},"abstract":"<jats:p> <jats:italic>\n            <jats:bold>Background:<\/jats:bold> Atrioventricular nodal reentrant tachycardia (AVNRT) is the most common mechanism of supraventricular tachycardia. Slow pathway (SP) ablation is the first\u2010line treatment approach with a high acute success rate and a low risk of inadvertent complete atrioventricular (AV) block. However, there is still some uncertainty as to the most appropriate procedural endpoints and the impact of these on risk of recurrence. We report the acute and long\u2010term results of SP ablation in a large single\u2010center consecutive series and analyze predictors of acute success and late recurrence.<\/jats:italic> <\/jats:p><jats:p> <jats:italic>\n            <jats:bold>Methods:<\/jats:bold> The study included 1,448 consecutive procedures in 1,419 patients with AVNRT (mean age 49 \u00b1 17 years, 66% women) who underwent SP ablation using a combined electrophysiologic and anatomic approach. Univariate and multivariate analysis was performed for potential predictors of acute success and late recurrence.<\/jats:italic> <\/jats:p><jats:p> <jats:italic>\n            <jats:bold>Results:<\/jats:bold> Acute success was achieved in 98.1%. Transient (first, second, or third degree) AV block occurred during the procedure in 20 (1.41%) patients. One patient (0.07%) had persistent first\u2010degree and transient second\u2010degree AV block after ablation and underwent pacemaker implant at day 21. Of the 1,391 patients with successful ablation, 22 patients (1.5%) developed AVNRT recurrence during a follow\u2010up period of 63 \u00b1 38 months. The only independent predictor of reduced procedural success was the presence of atypical AVNRT (hazard ratio 3.1, P = 0.04). Independent predictors of AVNRT recurrence were age &lt;20 years and female gender (hazard ratios 14.1 and 3.7, respectively). No significant difference in the incidence of late recurrence was observed in patients with or without residual slow\u2010pathway conduction, or according to use of isoproterenol testing or general anesthesia. However, patients with a single echo with recurrence had a significantly larger echo window (median 85 ms) than those without (median 30 ms, P = 0.01).<\/jats:italic> <\/jats:p><jats:p> <jats:italic>\n            <jats:bold>Conclusions:<\/jats:bold> This study demonstrates in a large consecutive single\u2010center series that SP ablation using radiofrequency energy is a highly effective procedure with an extremely low risk of inadvertent AV block and a low recurrence rate. We found that single\u2010AV nodal echo beats represented a procedural endpoint that did not predict AVNRT recurrence but that a large echo window is associated with recurrence. Recurrence rates in this series were higher in young women, possibly reflecting a more conservative approach to ablation in this age group. (PACE 2011; 34:927\u2013933)<\/jats:italic> <\/jats:p>","DOI":"10.1111\/j.1540-8159.2011.03092.x","type":"journal-article","created":{"date-parts":[[2011,5,13]],"date-time":"2011-05-13T18:06:32Z","timestamp":1305309992000},"page":"927-933","source":"Crossref","is-referenced-by-count":66,"title":["Predictors of Acute and Long\u2010Term Success of Slow Pathway Ablation for Atrioventricular Nodal Reentrant Tachycardia: A Single Center Series of 1,419 Consecutive 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