Respiratory frequency response to progressive isocapnic hypoxia.
نویسندگان
چکیده
منابع مشابه
Acute cardiovascular response to isocapnic hypoxia. II. Model validation.
The role of the different mechanisms involved in the cardiovascular response to hypoxia [chemoreceptors, baroreceptors, lung stretch receptors, and central nervous system (CNS) hypoxic response] is analyzed in different physiological conditions by means of a mathematical model. The results reveal the following: 1) The model is able to reproduce the cardiovascular response to hypoxia very well b...
متن کاملAcute cardiovascular response to isocapnic hypoxia. I. A mathematical model.
A mathematical model of the acute cardiovascular response to isocapnic hypoxia is presented. It includes a pulsating heart, the systemic and pulmonary circulation, a separate description of the vascular bed in organs with the higher metabolic need, and the local effect of O(2) on these organs. Moreover, the model also includes the action of several reflex regulatory mechanisms: the peripheral c...
متن کاملRespiratory and cardiovascular adaptations to progressive hypoxia
Methods and Results We recorded ventilation, end-tidal oxygen (PETO2) and carbon dioxide partial pressures, RR interval and blood pressure during progressive isocapnic hypoxia, before and after 14 days of: (a) interval hypoxic training (three to four periods of 7 min progressive hypoxia in 1 h, each day) in 12 healthy men (training group); (b) breathing into a spirometer by six age-matched male...
متن کاملCardiovascular and respiratory responses of ducks to progressive hypocapnic hypoxia.
A fall in oxygen tension of the inspired air demands that both circulatory and respiratory adjustments be made if the tissues are to receive an adequate supply of oxygen. Increase in ventilation will reduce the oxygen tension difference between the air breathed and the arterial blood, but even so when the oxygen tension of the arterial blood (PB> 0 | ) falls a decrease in oxygen supply to the t...
متن کاملHuman ventilatory response to CO2 after 8 h of isocapnic or poikilocapnic hypoxia.
During ventilatory acclimatization to hypoxia (VAH), the relationship between ventilation (VE) and end-tidal PCO2 (PETCO2) changes. This study was designed to determine 1) whether these changes can be seen early in VAH and 2) if these changes are present, whether the responses differ between isocapnic and poikilocapnic exposures. Ten healthy volunteers were studied by using three 8-h exposures:...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1976
ISSN: 0022-3751
DOI: 10.1113/jphysiol.1976.sp011404