title: [Effects of body position changes on frequency domain correlative cardiogram in pilots].
abstract: OBJECTIVE
  To study the effects of the body position changes on FCG in pilots so as to explore the possibility of using FCG as an indicator of medical monitoring and medical support.
  
  
  METHODS
  65 pilots were examined in 4 different body positions, i.e. supine position, head-down position, standing position and sitting position. Twelve channel routine electrocardiogram was recorded synchronously, and their complaints were also recorded.
  
  
  RESULTS
  The grade distribution and abnormal cases of the FCG varied with the body positions. The orders of changing magnitude were: the standing position, the head-down position, the sitting position and the supine position. The changes accorded with that of 12 channels routine ECG synchronously recorded and complaints of the subjects.
  
  
  CONCLUSIONS
  The FCG was an objective index representing the cardiac functional status.
authors.affiliation: Institute of Space Medico-Engineering, Beijing, China.
authors.forename: Zhi-ming
authors.initials: ZM
authors.lastname: Xu
authors.forename: Xing-yun
authors.initials: XY
authors.lastname: Shen
authors.forename: Guo-yin
authors.initials: GY
authors.lastname: Liu
authors.forename: Zhi-zhong
authors.initials: ZZ
authors.lastname: Tang
mesh_terms: D000328:Adult; D000337:Aerospace Medicine; D001359:Aviation; D004562:Electrocardiography; D018475:Head-Down Tilt; D006801:Humans; D008991:Monitoring, Physiologic / Q000379:methods*; D011187:Posture / Q000502:physiology*; D016683:Supine Position