Inclusion Criteria:  Patients undergoing scheduled elective cardiac ablation procedures who have signed an informed consent Patients who are > 18 years of age. Patients undergoing a repeat elective cardiac AF Procedure  Exclusion Criteria:  A complex arrhythmia secondary to a reversible cause Significant congenital anomaly or medical problem that in the opinion of the investigator would preclude enrollment in this study. Any cardiac surgery within the past 60 days (2 months) (includes PCI) Concurrent enrollment in a study evaluating another device or drug A complex arrhythmia secondary to electrolyte imbalance, thyroid disease or non-cardiac issue Presence of intra-cardiac thrombus or myxoma, interatrial baffle or patch, tumor or other abnormality that precludes catheter introduction or manipulation. Presence of a condition that precludes vascular access. Women of child baring potential whom are pregnant, lactating, or planning to become pregnant during the course of the clinical investigation. Active illness or active systemic infection or sepsis.