[Effects of body position changes on frequency domain correlative cardiogram in pilots].
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.
Xu
Zhi-ming
ZM
Institute of Space Medico-Engineering, Beijing, China.
Shen
Xing-yun
XY
Liu
Guo-yin
GY
Tang
Zhi-zhong
ZZ
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