title: [Influence of obstructive sleep apnea-hypopnea syndrome on the QTc interval].
abstract: OBJECTIVE
  To investigate the influence of obstructive sleep apnea-hypopnea syndrome (OSAHS) on the QTc interval.
  
  
  METHODS
  By the polysomnograph,98 patients were divided into an obstructive sleep apnea-hypopnea syndrome group and a control group. We tested their 24 hour DCG and observed the difference of the heart rate,QT interval and QTc interval at the same time.
  
  
  RESULTS
  We compared the heart rate (76 +/- 10 bt/min), QT interval (366 +/- 30 ms), and QTc interval (404 +/- 45 ms) with those of the control group (73 +/- 96 bt/min, 342 +/- 31 ms, 374 +/- 30 ms, respectively). The QT interval and QTc interval significantly differred (P < 0.05).
  
  
  CONCLUSIONS
  The QT interval and QTc interval in the OSAHS group has been prolonged, suggesting OSAHS might be a high risk factor in arrhythmia and sudden death.
authors.affiliation: Department of Geriatrics, Second Xiangya Hospital, Central South University, Changsha 410011, China.
authors.forename: Ying-Quan
authors.initials: YQ
authors.lastname: Luo
authors.forename: Yu
authors.initials: Y
authors.lastname: Yang
authors.forename: Shao-Fen
authors.initials: SF
authors.lastname: Yu
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001145:Arrhythmias, Cardiac / Q000209:etiology; D016757:Death, Sudden, Cardiac / Q000209:etiology; D015716:Electrocardiography, Ambulatory; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D017286:Polysomnography; D012307:Risk Factors; D020181:Sleep Apnea, Obstructive / Q000150:complications / Q000503:physiopathology*