title: [A study on the association of obstructive sleep apnea hypopnea syndrome with coronary atherosclerosis and coronary heart disease].
abstract: OBJECTIVE
  To investigate the association of obstructive sleep apnea hypopnea syndrome (OSAHS) with coronary atherosclerotic disease (CAD).
  
  
  METHODS
  From March of 2005 to December of 2005, 82 subjects admitted into Department of Cardiology of The First Affiliated Hospital of Nanjing Medical University were recruited. They were divided into three groups based on their nocturnal apnea hypopnea index (AHI) detected by examination of polysomnography (PSG): mild OSAHS group (5 < AHI < or = 20, 38 cases), moderate-to-severe group (AHI > 20, 20 cases) and control group (AHI < 5, 24 cases). Coronary artery angiography and Gensini Score for assessing the severity of coronary atherosclerosis were performed in all three groups.
  
  
  RESULTS
  Compared with the control group, the apnea-hypopnea index (AHI) was significantly higher in OSAHS groups [10.9 (7.7 - 15.2), 29.3 (23.3 - 48.4) vs 2.9 (1.9 - 3.8)]. The minimal SpO(2) was significantly lower (84 +/- 9)%, (81 +/- 9)% in OSAHS groups than that in the control group (89 +/- 6)%. The incidence of CAD was significantly higher [66% (25/38) and 95% (19/20)] in OSAHS groups than in the control group [17% (4/24)]. The percentage of patients with single-coronary-vessel disease was 24% (9/38) in mild OSAHS group, 20% (4/20) in moderate-to-severe OSAHS group, and 17% (4/24) in control group. The patients with multi-coronary-vessel disease were 42% (16/38) in mild OSAHS group, 80% (16/20) in moderate-to-severe OSAHS group, and 12.5% (3/24) in control group. Gensini Score was significantly higher in moderate-to-severe OSAHS group than that in control group [35.0 (16.5 - 87.0), 1.0 (0.0 - 5.0)]. Moreover, a positive correlation was revealed between AHI and Gensini Score.
  
  
  CONCLUSIONS
  OSAHS may be a significant independent risk factor of coronary atherosclerosis and CAD and should be taken into account in CAD secondary prevention.
authors.affiliation: Department of Pulmonary Medicine, Gerontology Research Institution of Jiangsu Province, Nanjing 210024, China.
authors.forename: Gan
authors.initials: G
authors.lastname: Lu
authors.forename: Zhuo-wen
authors.initials: ZW
authors.lastname: Xu
authors.forename: Jian-nan
authors.initials: JN
authors.lastname: Liu
authors.forename: Yu-lin
authors.initials: YL
authors.lastname: Zhang
authors.forename: Zhi-jian
authors.initials: ZJ
authors.lastname: Yang
authors.forename: Xi-long
authors.initials: XL
authors.lastname: Zhang
authors.forename: Kai-sheng
authors.initials: KS
authors.lastname: Yin
mesh_terms: D000368:Aged; D017023:Coronary Angiography; D003324:Coronary Artery Disease / Q000150:complications*; D004452:Echocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017286:Polysomnography; D020181:Sleep Apnea, Obstructive / Q000150:complications* / Q000000981:diagnostic imaging / Q000503:physiopathology*