Comparison of PVI Plus Catheter Ablation or PVI Alone for the Treatment of AFib for Patients With Paroxysmal Atrial Fibrillation

Inclusion Criteria: (Step 1 - Registration) * The subject is 18 years of age or older * Left atrium \< 6.0 cm (Trans Thoracic Echo - TTE - parasternal 4 chamber view * performed within 6 months) * Documentation of AF that terminates spontaneously or with intervention within 7 days of onset (PAF) Failed or refractory to one AAD (class I and/or III) * Provided written informed consent * Be eligible for an AF ablation procedure for Paroxysmal AF (Step 2 - Randomization) * Sustained AF following PVI with ability to receive additional linear or focal intracardiac catheter ablation Exclusion Criteria: (Step 1 - Registration) * Pregnant or planning to become pregnant during study * Co-morbid medical conditions that limit one-year life expectancy * Previous cardiac surgery * Patients who have active infection or sepsis * Patients with esophageal ulcers strictures and varices * Patients who are contraindicated for anticoagulants such as heparin and warfarin * Patients who are being treated for ventricular arrhythmias * Patients who have had a previous left atrial catheter ablation for AF (does not * include ablation for AFL or other supraventricular arrhythmias) * Current participation in another clinical investigation of a medical device or a drug, or recent participation in such a study within 30 days prior to study enrollment * Not competent to legally represent him or herself (e.g., requires a guardian or * caretaker as a legal representative) (Step 2 Randomization) * Not able to receive additional linear or focal intracardiac catheter ablation