Hi had persistent AF for a couple of yrs had cardiversion but reverted back after 1 month that was 18 months ago. Had attempt at ablation but it was aborted after a couple of hours due to access problems. CT revealed a fattty mass had TOE yesterday and it is a large Lipoma in the atrial septum. Ablation will have to be done surgically and in 3 weeks i will find out if removal of the Lipoma is an option. Does anyone know anything about these procedures?