Effects of Obstructive Sleep Apnea Hypopnea Syndrome on Blood Pressure and C-Reactive Protein in Male Hypertension Patients.

Abstract

BackgroundThe influences of obstructive sleep apnea hypopnea syndrome (OSAHS) on blood pressure and C-reactive protein (CRP) were observed, and the underlying mechanism was investigated.MethodsRespiratory sleep monitoring was performed on 188 male patients who were newly diagnosed with hypertension. Based on the apnea hypopnea index (AHI) results, patients were divided into a normal control group (AHI ≤ 5, n = 35), a mild OSAHS group (5 < AHI ≤ 15, n = 28), a moderate OSAHS group (15 < AHI ≤ 30, n = 57), and a severe OSAHS group (AHI > 30, n = 68). Ambulatory blood pressure monitoring was conducted on patients in each group, and blood samples were collected to detect indicators, including fasting blood glucose (FBG), triglyceride (TG), low-density lipoprotein-cholesterol (LDL-C), high-density lipoprotein-cholesterol (HDL-C), and high-sensitivity CRP (hs-CRP).ResultsTG and hs-CRP in patients in the moderate and severe OSAHS groups were higher than those in the normal control group (P < 0.01, P < 0.05). Additionally, their mean nocturnal systolic blood pressure (nSBP) and nocturnal diastolic blood pressure (nDBP) were higher than those in the normal control group (P < 0.01, P < 0.05). However, the percentage of blood pressure reduction at night was significantly lower than that in the normal control group (P < 0.01). AHI and hs-CRP positively correlated with nSBP (adjusted R2 = 0.46) and nDBP (adjusted R2 = 0.38) and negatively correlated with the nocturnal blood pressure reduction percentage (adjusted R2 = 0.48).ConclusionModerate and severe OSAHS induced increases in nocturnal blood pressure and CRP content in the body, resulting in further damage to the circadian rhythms of blood pressure.