Sleep Medicine
Statins in OSA
Obstructive sleep apnea is linked with cardiovascular disease (CVD) (Wolk R, et al. Circulation. 2003;108[1]:9), and the primary treatment of OSA, ie, continuous positive airway pressure (CPAP), may reverse the adverse CVD sequelae associated with OSA. However, recent randomized controlled trials, including SAVE and RICCADSA, fail to show significant reductions in CVD events with CPAP therapy (McEvoy RD, et al. J Thorac Dis. 2010;2[3]:138; Peker Y, et al. Am J Respir Crit Care Med. 2016;194[5]:613). Although numerous reasons are postulated for these unexpected trial findings, one potential explanation is that individuals in these trials were already on CVD protective drugs. One such drug category is statins. Statins are prescribed for their lipid lowering effects; however, they have pleiotropic properties including reduction in vascular inflammation and oxidative stress. Statins also enhance endothelial function and improve blood pressure. In animal studies, statins prevented the adverse effects of chronic intermittent hypoxemia on systolic blood pressure, endothelial function, and carotid artery compliance. Human studies confirm some of the aforementioned animal study findings. In a study of patients with OSA, statin therapy preserved the anti-inflammatory cell surface proteins that are typically reduced in these patients (Emin M, et al. Sci Transl Med. 2016;8[320]:320ra1). In a randomized controlled trial of patients with OSA, statin therapy significantly improved systolic blood pressure but did not improve reactive hyperemia index, which is a marker of endothelial dysfunction (Joyeux-Faure M, et al. Mediators Inflamm. 2014 Aug 25. doi: 10.1155/2014/423120).
Dr. Neomi Shah
Therefore, the jury is still out regarding the independent impact of statin therapy on CVD risk reduction in patients with OSA. Yet, there is select evidence suggesting there may be a role for statins in patients with OSA to mitigate the CVD risk associated with OSA. It remains unknown whether statins work synergistically with CPAP to further reduce CVD risk.
Neomi Shah, MD
Steering Committee Member