150 healthy male pilots, aged 22-46 years (31 +/- 5) were examined with the HBD-II A instrument. The results showed that vectorcardiogram (VCG) parameters of pilots were within the normal value by clinical diagnosis standard of VCG, but some indexes of VCG appeared different from the normal people, these might be the characteristics of VCG of pilots. The present study provided some new parameters of VCG such as P loop. The results of this study may be used for pilots selection and real-time medical monitoring for pilots on ground training.
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