Electrophysiologic characteristics of multiple accessory pathways

Lee, Young Soo; Guen, Tak Gun; Kim, Sung Yel; Son, Bong Jun; Jo, Bong Gi; Han, Seong Wook; Hur, Seoung Ho; Kim, Yoon Nyun

Abstract

BACKGROUND: The purpose of this study was to investigate the clinical and electro physiologic characteristics of patients with multiple accessory pathways. Recently as endocardial mapping has become more and more accurate, multiple accessory pathways which were considered to be rare in the past, have become more commonly reported in patients with Wolff-Parkinson-White syndrome.
METHODS
From February 1993 to June 2000, there were a total of 452 patients, who were confirmed to have accessary pathway mediated-tachyarrhythmias diagnosed by electrophysiologic study. Among those, 19 patients had multiple accessory pathways, and were enrolled in this study.
RESULTS
Among the 19 patients, thirteen patients were male and six were female, and their mean age was 36.5+/-16.17 years. All patients had 2 accessory pathways. The distribution of the location of the accessory pathways was at the left free wall (71.1%), right free wall (18.4%) and posteroseptal wall (10.5%). The most common combination pattern was the left free wall and left free wall (57.9%) and the most common anatomical areas were the left lateral wall and left posterior wall (36.8%). The success rate of the catheter ablation was 84.2% (16/19). The recurrence rate after the radiofrequency catheter ablation was 31.3% (5/16) and the most common recurrence site was left free wall (60.0%, 3/5).
CONCLUSION
These results indicated that the clinical and electrophysiologic characteristics of the multiple accessory pathway patients with WPW syndrome in our study were similar to those of western countries.