In the United States, there is an epidemic of obstructive sleep apnea (also called sleep apnea or OSA). OSA is common in the United States. 25% of men and 10% of women have sleep apnea. This is important because it is complicated by an increased rate of death from abnormal heart rhythms, as well as low oxygen levels that can produce cardiac and brain side effects. Also, importantly, patients who have sleep apnea have fatigue…