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Monitoring the bispectral index (full line) and peripheral oxygen saturation (dotted line) under deep sedation using a supraglottic airway (Group A) during radiofrequency catheter ablation (RFCA) of atrial fibrillation using EnSiteTM (St. Jude Medical, St. Paul, MN, USA). RFCA could be steadily performed by monitoring the BIS index without any hypoxia. PVAI=pulmonary vein antrum isolation.
