Evaluation of Electrophysiological Mechanisms of Post-Surgical Atrial Tachycardias Using an Automated Ultra-High-Density Mapping System

摘要: Abstract Objectives This study aimed to evaluate the electrophysiological mechanisms of post-surgical atrial tachycardias (ATs) during mapping with an automated high-resolution system (Rhythmia, Boston Scientific, Marlborough, Massachusetts). Background Mapping and ablation post-operative ATs following previous open-heart surgery is often challenging because potential remain incompletely understood. Methods Fifty-one consecutive patients underwent ATs. Results A total 64 were identified, mechanism was macro re-entry in 58 63 (92.1%) ATs, focal 4 ATs, localized micro 1 AT, undetermined AT. Of 11 who surgical repair congenital heart disease, 6 (54.5%) had peri-tricuspid re-entrant 5 either right (RA) free-wall incisional or figure-8 isthmus between tricuspid annulus RA incision incisions, none left (LA) In 32 valve replacement 8 valvuloplasty, observed 14 (43.4%) (75%) patients, free wall septal incisions-related seen 7 2 LA 12 patient, respectively. pseudo pattern identified 51 (15.7%). All these activations could be easily excluded by manually moving window interest, except cases a configuration. Conclusions predominate, irrespective types initial procedures, but occur more frequently replacement. Pseudo activation common recognized adjusting window.