 Diagnosis and treatment of sleep apnea with continuous positive airway pressure CPAP therapy has been shown to decrease arrhythmia recurrence in patients with AF following ablation. However, patients with AF undergoing ablation are not routinely screened for sleep apnea, despite an estimated sleep apnea prevalence of 25 in the general population, and perhaps higher among patients with AF. Home sleep testing is frequently used for evaluation of sleep apnea. 