Inclusion Criteria:  Documentation of symptomatic persistent AF: Defined as having a continuous episode lasting longer than 7 days but less than 6 months documented by consecutive ECG recordings OR Defined as having a continuous episode lasting longer than 7 days but less than 6 months documented by an ECG recording and one doctor note indicating patient had symptoms consistent with AF Age 18 or older (or older than 18 if required by local law) Structurally normal heart with LVEF ≥50%, interventricular septum thickness ≤ 12 mm, and left atrial diameter <46 mm (short axis) as obtained by transthoracic echocardiography. • Normal ECG parameters when measured in sinus rhythm (QRS width ≤120 ms in a 12-channel surface ECG, QTc interval <440 ms, and PQ interval ≤210 ms).  Exclusion Criteria:  History of AF treatment with class I or III antiarrhythmic drug, including sotalol, with the intention to prevent an AF recurrence. However, patients pretreated with above AAD for less than 7 days with the intention to convert an AF episode are allowed. left atrial ablation or surgical procedure (including left atrial appendage closures) Presence or likely implant of a permanent pacemaker, biventricular pacemaker, loop recorder, or any type of implantable cardiac defibrillator (with or without biventricular pacing function) within 12 months Presence of any pulmonary vein stents Presence of any pre-existing pulmonary vein stenosis Pre-existing hemidiaphragmatic paralysis Presence of any cardiac valve prosthesis +3 and +4 mitral valve regurgitation or stenosis Any cardiac surgery, myocardial infarction, percutaneous coronary intervention (PCI) / percutaneous transluminal coronary angioplasty (PTCA) or coronary artery stenting which occurred during the 3 month interval preceding e consent date Unstable angina New York Heart Association (NYHA) Class II, III or IV congestive heart failure Primary pulmonary hypertension Rheumatic heart disease Thrombocytosis, thrombocytopenia Any condition contraindicating chronic anticoagulation Active systemic infection Hypertrophic cardiomyopathy Cryoglobulinemia Uncontrolled hyperthyroidism Any cerebral ischemic event (strokes or transient ischemic attacks (TIAs)) which occurred during the 6 month interval preceding the consent date Any woman known to be pregnant or breastfeeding. Life expectancy less than one year Current or anticipated participation in any other clinical trial of a drug, device or biologic during the duration of the study not pre-approved by Medtronic Active intracardiac thrombus Known drug or alcohol dependency Unwilling or unable to comply fully with study procedures and follow-up Significant Chronic Kidney Disease-estimated Glomerular Filtration Rate(CKD-eGFR) <30umol/L