Table 1. Risk factors for atrial fibrillation recurrence after ablation.

Age	Increased risk of recurrence with advancing age
AF duration and type	(Longstanding persistent > persistent > paroxysmal)
Cardiac structural changes	Left atrial dilatation; left ventricular function; hypertrophic cardiomyopathy; valvular heart disease
Clinical features	Hypertension; obesity; obstructive sleep apnea/sleep disordered breathing; metabolic syndrome; thyroid disease