Patients with resistant hypertension, pulmonary hypertension, and recurrent atrial fibrillation following cardioversion/ablation should be prioritized for diagnostic testing for OSA. Patients with other conditions, such as coronary artery disease or cerebrovascular disease, should also be referred to a sleep center if OSA is suspected on the basis of comprehensive sleep assessment. OSA has also been associated with type 2 diabetes, metabolic syndrome, and asthma.