What is the clinical significance of newly appreciated left atrial enlargement following atrial fibrillation ablation and approach to monitoring for atrial fibrillation recurrence post-ablation in that setting? 

An enlarged left atrium is a risk factor for recurrent AF after ablation or during antiarrhythmic drug treatment. How much it increases risk is not completely understood. While LA size or volume can be used to help decide about post-treatment monitoring, the most important element is vascular risk, ...