Yes. Physicians taking care of patients who have hypertension and resistant hypertension should be aware of the possible diagnosis of obstructive sleep apnea (OSA) and offer in-laboratory polysomnography or home sleep testing if appropriate. Large, long-term observational studies have shown higher incidence rates of hypertension in people with untreated OSA than in those who underwent treatment for it with continuous positive airway pressure (CPAP). Read more on how OSA and hypertension are linked in this article from Cleveland Clinic Journal of Medicine, available at: http://www.ccjm.org/current-issue/issue-single-view/should-i-suspect-obstructive-sleep-apnea-if-a-patient-has-hard-to-control-hypertension/b8ddb92518fe3517d3e073b1eacb89c2.html.