title: Effects of Obstructive Sleep Apnea Hypopnea Syndrome on Blood Pressure and C-Reactive Protein in Male Hypertension Patients.
abstract: BACKGROUND
  The influences of obstructive sleep apnea hypopnea syndrome (OSAHS) on blood pressure and C-reactive protein (CRP) were observed, and the underlying mechanism was investigated.
  
  
  METHODS
  Respiratory 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).
  
  
  RESULTS
  TG 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 R(2) = 0.46) and nDBP (adjusted R(2) = 0.38) and negatively correlated with the nocturnal blood pressure reduction percentage (adjusted R(2) = 0.48).
  
  
  CONCLUSIONS
  Moderate 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.
authors: The International Medical Center of the People's Liberation Army General Hospital, District 3, Division 2, 28 Fuxin Road, Beijing 100853, China.
authors: Fan
authors: F
authors: Li
authors: The International Medical Center of the People's Liberation Army General Hospital, District 3, Division 2, 28 Fuxin Road, Beijing 100853, China.
authors: Hui
authors: H
authors: Huang
authors: The International Medical Center of the People's Liberation Army General Hospital, District 3, Division 2, 28 Fuxin Road, Beijing 100853, China.
authors: Ligong
authors: L
authors: Song
authors: The International Medical Center of the People's Liberation Army General Hospital, District 3, Division 2, 28 Fuxin Road, Beijing 100853, China.
authors: Hua
authors: H
authors: Hao
authors: The International Medical Center of the People's Liberation Army General Hospital, District 3, Division 2, 28 Fuxin Road, Beijing 100853, China.
authors: Mingzhong
authors: M
authors: Ying
keywords: C-reactive protein; Hypertension; Obstructive sleep apnea hypopnea syndrome