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 reduction in the amount of atrial fibrillation. Recurrences can be due to triggers coming from outside the pulmonary veins or may be due to reconnection of the pulmonary vein muscle fibers to the left atrium. This can require a repeat ablation procedure depending on the severity of recurrence.