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Sleep apnea negatively impacts patients' ability to oxygenate the bloodstream during sleep and has far-reaching, deleterious effects. The present study sought to assess the correlation between obstructive sleep apnea hypopnea syndrome (OSAHS), carotid atherosclerosis, and blood pressure variability (BPV), and to evaluate the therapeutic effects of continuous positive airway pressure (CPAP). Patients with OSAHS were classified as mild, moderate, or severe according to their condition and compared with healthy control participants. CPAP treatment was used to treat patients with OSAHS for 6 months. Prior to CPAP treatment, the apnea-hypopnea index (AHI), lowest blood oxygen saturation (LSaO 2 ), carotid intima media thickness (IMT), and plasma levels of endothelin-1 (ET-1), nitric oxide (NO), and tumor necrosis factor-α (TNF-α) were measured in all participants, along with the low frequency components of BPV (BPV LF). The results demonstrated that carotid IMT, AHI, plasma ET-1, and plasma TNF-α were significantly higher in patients with OSAHS than those in the control group (P&lt;0.05); whereas LSaO 2 and plasma NO levels were significantly higher in the control group (P&lt;0.05). The degree to which these indices differed was associated with the severity of OSAHS. Furthermore, the carotid IMT of patients with OSAHS was significantly correlated with AHI (P=0.037), plasma ET-1 (P=0.001), plasma NO (P&lt;0.001), BPV LF before retiring (P&lt;0.001). Following CPAP treatment, the observation indices of patients with moderate or severe OSAHS improved significantly (P&lt;0.01). These results support the use of CPAP to improve the significant vascular endothelial dysfunction, increased inflammatory response, and high blood pressure variability correlated with carotid atherosclerosis observed in patients with OSAHS.

experimental and therapeutic medicine

Efficacy of continuous positive airway pressure treatment in treating obstructive sleep apnea hypopnea syndrome associated with carotid arteriosclerosis