Sleep-disordered Breathing and Incident Heart Failure in Older Men

Sogol Javaheri, Terri Blackwell, Sonia Ancoli-Israel, Kristine E Ensrud, Katie L Stone, Susan Redline
American Journal of Respiratory and Critical Care Medicine 2016 March 1, 193 (5): 561-8

RATIONALE: The directionality of the relationship between sleep-disordered breathing and heart failure is controversial.

OBJECTIVES: We assessed whether elevations in the obstructive or central sleep apnea index or the presence of Cheyne-Stokes breathing are associated with decompensated and/or incident heart failure.

METHODS: We conducted a prospective, longitudinal study of 2,865 participants derived from the Osteoporotic Fractures in Men Study, a prospective multicenter observational study of community-dwelling older men. Participants underwent baseline polysomnography and were followed for a mean 7.3 years for development of incident or decompensated heart failure. Our main exposures were the obstructive apnea-hypopnea index (AHI), central apnea index (CAI ≥ 5), and Cheyne-Stokes breathing. Covariates included age, race, clinic site, comorbidities, physical activity, and alcohol and tobacco use.

MEASUREMENTS AND MAIN RESULTS: CAI greater than or equal to five and presence of Cheyne-Stokes breathing but not obstructive AHI were significant predictors of incident heart failure (adjusted hazard ratio [HR], 1.79; 95% confidence interval [CI], 1.16-2.77 for CAI ≥ 5) (HR, 2.23; 95% CI, 1.45-3.43 for Cheyne-Stokes breathing). After excluding those with baseline heart failure, the incident risk of heart failure was attenuated for those with CAI greater than or equal to five (HR, 1.57; 95% CI, 0.92-2.66) but remained significantly elevated for those with Cheyne-Stokes breathing (HR, 1.90; 95% CI, 1.10-3.30).

CONCLUSIONS: An elevated CAI/Cheyne-Stokes breathing, but not an elevated obstructive AHI, is significantly associated with increased risk of decompensated heart failure and/or development of clinical heart failure in a community-based cohort of older men.

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