PO-04-004 UTILITY OF OPEN-WINDOW MAPPING FOR CATHETER ABLATION OF ACCESSORY PATHWAY

Open window mapping (OWM) is a novel automated methods for catheter ablation of an accessory pathway (AP), in which the local signal annotated with windows interest parameters set to analyze both atrial and ventricular signals. We sought determine utility OWM identify location APs patients APs. In this two-center study, 28 (20 male, 55 years old: IQR 22-67) who underwent high-density extended early-meets-late (EEML) algorithm (CARTO 3, Biosense Webstar, USA) using 20-electrode, 5-spline (Pentaray, Webster) were enrolled. The lower threshold EEML was adjust gap match propagation (Figure A) > 1cm defined as wide AP B). median points, time, 2399 points (1736-3798), 24 minutes (16-30), 22 (18-25), respectively. successfully eliminated all (22 mitral annulus six tricuspid annulus), 19 by first radiofrequency (RF) application (68%). revealed or multiple 10 (36%), whom RF applications required eliminate facilitates visualize width APs, particularly useful predict whether linear cluster lesion sets are