Inclusion Criteria:  Patients with symptomatic paroxysmal or persistent atrial Fibrillation.1 Patients referred for a clinically indicated catheter ablation with a plan for PVI only. 18-85 year of age at time of consent. Able and willing to comply with all protocol requirements. Signed patient Informed Consent (ICF).  Exclusion Criteria:  History of prior left-sided catheter or surgical ablation for AF or atypical atrial flutter, including MAZE or mini MAZE. Prior ablation for typical atrial flutter or left-sided ablation for WPW, AV-node reentry tachycardia or right-sided focal ectopic atrial tachycardia may be included. Planned for left atrial ablation beyond PVI. Uncontrolled heart Failure or NYHA Class III or IV heart failure. Left ventricular ejection fraction < 35 % Left atrial size > 55 mm diameter on echocardiogram. Severe Pulmonary Hypertension Reversible causes of AF (electrolyte imbalance, thyroid disease…) Poor candidate for general anesthesia or deep sedation Anticipated survival < 1 year MI or CABG within 3 months, severe valvular disease Any documented thromboembolic event within 6 months. Contraindication to systemic oral anticoagulation therapy. Significant congenital anomaly or medical condition that may affect the integrity of study data. Women who are pregnant or breastfeeding. Active enrollment in another investigational study involving a drug or device.