title: [Cardiac arrhythmias in pilots under positive (+Gz) acceleration].
abstract: OBJECTIVE
  To study the relationship between cardiac arrhythmias and autonomic nervous regulation in pilots under +Gz acceleration.
  
  
  METHODS
  Dynamic ECG during +Gz exposures in 36 orthostatic intolerance pilots and 62 healthy pilots were analysed and compared.
  
  
  RESULTS
  The orthostatic intolerance pilots had obviously lower +Gz tolerance and more cardiac arrhythmias. The cardiac arrhythmias could affect +Gz tolerance.
  
  
  CONCLUSIONS
  The cardiac arrhythmias under +Gz acceleration could be taken as an index of evaluating cardiovascular compensatory function and warning against acceleration (+Gz) induced loss of consciousness (G-LOC).
authors.affiliation: General Hospital of the Air Force, Beijing, China.
authors.forename: G Y
authors.initials: GY
authors.lastname: Ji
authors.forename: J
authors.initials: J
authors.lastname: Zheng
authors.forename: J S
authors.initials: JS
authors.lastname: Jin
authors.forename: L J
authors.initials: LJ
authors.lastname: Wang
mesh_terms: D000054:Acceleration; D000328:Adult; D000337:Aerospace Medicine; D001145:Arrhythmias, Cardiac / Q000453:epidemiology* / Q000209:etiology / Q000503:physiopathology; D001341:Autonomic Nervous System / Q000503:physiopathology*; D001359:Aviation; D002498:Centrifugation; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D018471:Hypergravity; D007024:Hypotension, Orthostatic / Q000453:epidemiology* / Q000209:etiology / Q000503:physiopathology; D015994:Incidence; D014474:Unconsciousness / Q000209:etiology / Q000503:physiopathology / Q000517:prevention & control*