title: [Clinical analysis of coronary artery disease in elderly patients with sleep disordered breathing].
abstract: OBJECTIVE
  To understand the prevalence of sleep disordered breathing (SDB) in elderly patients with coronary artery disease (CAD) and explore the relations between SDB and CAD.
  
  
  METHODS
  Sixty-two elderly patients with and 18 without CAD identified by coronary angiography underwent examinations by polysomnography (PSG). Left ventricular ejection fraction (LVEF) was measured by 99Tc equilibrium radionuclide angiography.
  
  
  RESULTS
  In the 62 elderly patients with CAD, 53.2% had SDB, a rate significantly higher that (22.2%) in the 18 non-CAD patients. The CAD patients with SDB had higher respiratory disturbance index (RDI) and body mass index (BMI) and lower arterial saturation of oxygen (SaO2) during sleep, with longer duration of low SPO2 (less that 90%). The incidence of hypertension was higher in CAD patients with SDB than in those without SDB. No significant correlation was found between the severity of coronary artery disease and RDI (r=-0.16, P>0.05).
  
  
  CONCLUSIONS
  The elderly patients with CAD have higher incidence of SDB, and appropriate interventions should be administered in those with severe SDB.
authors.affiliation: Guangdong Provincial Geriatrics Institute, Guangdong Provincial People's Hospital, Guangzhou 510080, China. liuhuixia89@21CN.com
authors.forename: Hui-xia
authors.initials: HX
authors.lastname: Liu
authors.forename: Pu
authors.initials: P
authors.lastname: Jin
authors.forename: Zhi-an
authors.initials: ZA
authors.lastname: Zhong
authors.forename: Sheng-qing
authors.initials: SQ
authors.lastname: Zhuo
authors.forename: Xiang-ting
authors.initials: XT
authors.lastname: Tian
authors.forename: Qiong
authors.initials: Q
authors.lastname: Ou
authors.forename: Rui-jin
authors.initials: RJ
authors.lastname: Cen
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002681:China / Q000453:epidemiology; D017023:Coronary Angiography; D003324:Coronary Artery Disease / Q000150:complications* / Q000000981:diagnostic imaging / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017286:Polysomnography; D015995:Prevalence; D012891:Sleep Apnea Syndromes / Q000150:complications* / Q000453:epidemiology / Q000503:physiopathology