Introduction of an expert system for the discrimination of local pulmonary vein and atrial far field signals.

Background: Discrimination of local and far field potentials during sinus rhythm and atrial fibrillation (AF) is essential for successful pulmonary vein (PV) isolation. We sought to introduce an expert system for the classification of electrophysiologic PV signals.

Methods: For the expert system database, we analyzed ablation procedures of 50 patients with paroxysmal and persistent AF.