Exclusion criteria
Those who meet any of the following criteria are ineligible for the study:
History of AF ablation or cardiac surgery.Left atrial dimension (LAD) > 55 mm (parasternal long‐axis view in transthoracic echocardiography).Inability to undergo a brain MRI.Women are currently or possibly pregnant.Concomitant participation in another intervention study.Patients whom doctors responsible for this study judge to be inappropriate.