[Biorhythmologic analysis of the dynamics of indices of pulmonary ventilation during orthostatic manipulations].
Pulmonary ventilation parameters (breathing depth, frequency and minute volume, and alveolar ventilation) of 5 healthy male test subjects who performed a 20-minute tilt test were analyzed. During tilt tests the above parameters showed oscillations in a range of about 1 minute. During the first 1-3 minutes of exposure the parameters exhibited an accentuated synchronization of the oscillations and the phenomenon of "general autonomic switch-over" with the negative phase (fall of the parameters under study below the baseline level after an initial increase above the baseline level). From the 4th minute till the 6.5th minute the function of individual components of the pulmonary ventilation system mismatched and the respiration efficacy fell. Thereafter this synchronization of the processes studied returned to the normal. Adequate adaptation of pulmonary ventilation to tilting developed not earlier than during the 13-14th minute.
D000328:Adult; D002245:Carbon Dioxide / Q000502:physiology; D006801:Humans; D008297:Male; D010507:Periodicity; D005082:Physical Exertion; D011187:Posture; D012119:Respiration
D002245:Carbon Dioxide
Bioritmologicheskiĭ analiz dinamiki pokazateleĭ legochnoĭ ventiliatsii pri ortostaticheskom vozdeĭstvii.