Atrial fibrillation is frequently disabling and resistant to antiarrhythmic
drugs. Curative treatment by catheter-based ablation has been shown to be
feasible either by achieving long linear lesions, mainly in the left atrium
, or by targeting the initiating focus, most frequently in the pulmonary ve
ins. This paper reviews the different ablation approaches, their results, p
otential complications, and relative merits.