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Circulation, Vol 84, 2366-2375, Copyright © 1991 by American Heart Association

ARTICLES

Single-catheter approach to radiofrequency current ablation of left- sided accessory pathways in patients with Wolff-Parkinson-White syndrome

KH Kuck and M Schluter
Department of Cardiology, University Hospital Eppendorf, Hamburg, FRG.

BACKGROUND. Catheter ablation with the use of radiofrequency current has been introduced as a therapeutic option for patients with tachyarrhythmias mediated by an accessory atrioventricular pathway. The technique conventionally implies the introduction of several catheters into the heart for assessment of electrophysiological parameters as well as for localization of the accessory pathway and may last for several hours. METHODS AND RESULTS. Thirty-four patients with Wolff- Parkinson-White syndrome and a delta wave pattern indicative of an overt (i.e., capable of consistent antegrade conduction) left-sided free-wall accessory pathway underwent attempts at radiofrequency current ablation of the pathway with the use of just one catheter. No patient had a previous electrophysiological study. The catheter was introduced into the left ventricle close to the mitral annulus and was used for pathway localization as well as for ablation. The approach was completely successful in 30 patients (88%). In the remaining four patients, ablation of the pathway was achieved by using the multiple- catheter approach. Overall procedure duration was 2.0 +/- 1.1 hours; radiation exposure time was 22.8 +/- 20.4 minutes (median, 17.3 minutes). There were no acute complications. CONCLUSIONS. The single- catheter approach to radiofrequency current ablation of overt left- sided free-wall accessory pathways is feasible, safe, and effective in the majority of patients. The approach requires considerable investigator experience but significantly reduces procedure duration and radiation exposure time.

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