[The vascular network of the adrenal medulla in experimentally simulated altitude sickness]

Laboratory rats were exposed to the effect of intermittent hypoxia every second day over the 11-day period. Conditions characteristic of 7000 m of height above sea level were imitated. The effect of hypoxia on the adrenal medulla vascular network in rats, sacrificed at different times after the completion of exposure to hypoxic conditions, was investigated. Stereological percentage of the medulla blood vessels was 23% in the control group, 37% in the group with sacrificed rats immediately after the last exposure, and 45% in the group 4 days after the end of experiment. The obtained results showed that increased blood supply in the adrenal medulla was achieved during the experimental treatment.