Published online before print April 10, 2006, doi: 10.1161/CIRCULATIONAHA.105.601898
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(Circulation. 2006;113:1824-1831.)
© 2006 American Heart Association, Inc.
Arrhythmia/Electrophysiology |
A Tailored Approach to Catheter Ablation of Paroxysmal Atrial Fibrillation
From the Division of Cardiovascular Medicine, University of Michigan, Ann Arbor.
Correspondence to Hakan Oral, MD, TC B1 140D, Cardiovascular Medicine, 1500 R. Medical Center Dr, Ann Arbor, MI 48109-0311. E-mail oralh{at}umich.edu
Received November 15, 2005; revision received February 7, 2006; accepted February 10, 2006.
Background— Because the genesis of atrial fibrillation (AF) is multifactorial and variable, an ablation strategy that involves pulmonary vein isolation and/or a particular set of ablation lines may not be equally effective or efficient in all patients with AF. A tailored strategy that targets initiators and drivers of AF is a possible alternative to a standardized lesion set.
Methods and Results— Catheter ablation was performed in 153 consecutive patients (mean age, 56±11 years) with symptomatic paroxysmal AF with the use of an 8-mm tip radiofrequency ablation catheter. The esophagus was visualized with barium. The pulmonary veins and left atrium were mapped during spontaneous or induced AF. Arrhythmogenic pulmonary veins were isolated or encircled. If AF was still present or inducible, complex electrograms in the left atrium, coronary sinus, and superior vena cava were targeted for ablation. The end point of ablation was absence of frequent atrial ectopy and spontaneous AF during isoproterenol infusion and noninducibility of AF. Routine energy applications near the esophagus were avoided. During follow-up, left atrial flutter developed in 19% of patients and was still present in 10% at >12 weeks of follow-up. A repeat ablation procedure was performed in 18% of patients. During a mean follow-up of 11±4 months, 77% of patients were free from AF and/or atrial flutter without antiarrhythmic drug therapy. Pericardial tamponade or transient neurological events occurred in 2% of procedures.
Conclusions— A tailored ablation strategy that only targets triggers and drivers of AF is feasible and eliminates paroxysmal AF in 
80% of patients.
CLINICAL PERSPECTIVE
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Circulation 2006 113: 1817.[Extract] [Full Text]
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