Abstracts of the 5th Annual Congress of the European Cardiac Arrhythmia Society. April 19-21, 2009. Paris, France.

摘要

Introduction Left atrial tachycardias (LAT) after radio-frequency (RF) circumferential pulmonary vein isolation (PVI) are common and well documented. Cryoballoon ablation (CBA) is an alternative technique for PVI in patients with atrial fibrillation (AF). Theoretically, LAT are less common after CBA than after RF PVI due to more homogeneous ablation lesions. The aim of our study was to compare the characteristics of LAT after CBA and RF PVI in patients (pts) with paroxysmal AF. Methods A total number of 302 pts were included into the study. CBA was carried out in 181 pts (131 males, mean age 55+ -9.5 years, left atrial diameter 42+ -5.9 mm). RF PVI was performed in 121 pts (76 males, mean age 56+ -14.6 years, left atrial diameter 43+ -5.3 mm). Pts with structural heart disease were not included. Daily trans-telephonic ECG monitoring, Holter-ECG were used to document recurretices. Redo ablation for LAT was performed in pts with symptomatic sustained drug-refractory tachycardia no earlier than 3 months after the initial procedure.