Kendzerska T, et al. - Researchers assessed the link between newly diagnosed obstructive sleep apnea (OSA) and incident hospitalized atrial fibrillation (AF) over the subsequent 10 years in a cohort of ,256 adults (62% men; mean age: 47 years). Eligible study participants were referred to a large academic hospital with suspected OSA between 1994 and 2010 and did not have arrhythmia at the first diagnostic sleep study. The investigators used Cox regressions to evaluate the link between OSA severity (measured by apnea-hypopnea index) and degree of nocturnal hypoxemia, and incident hospitalized AF. They found that, over a median follow-up period of 10 years, 173 participants (2.1%) were hospitalized with AF. Overall, they noted an independent association of nocturnal hypoxemia with a 77% increased hazard of incident hospitalized AF.