Had my first bout 4 years ago..ATC so declared it at medical.No pain, no interference with normal routine, 24 hour Holter moniter every 12 months, Echo cardiogram EKG etc...declared fit for duty.
Pills to regulate pulse, blood thinners for clotting, more pills for rhythm ....Canadian Class 2 medical so can't compare to Class 1 . Look at sleep apnea , apparently there is a link. Good luck.