How effective is ablation for atrial fibrillation?

In general, you can expect an 85% reduction in atrial fibrillation. This may be a complete elimination or just a drop in atrial fibrillation. Recurrences can be due to triggers from outside the pulmonary veins or to reconnection of the pulmonary vein muscle fibers to the left atrium. Depending on the severity of the recurrence, a repeat ablation procedure may be required.