AI Article Synopsis
- The cardiovascular system of a healthy person adapts to acute hypoxia (oxygen deficiency) via two primary mechanisms: one focusing on increased heart function (cardiac component) and another emphasizing vascular adjustments (vascular component).
- In the first response, there is an increase in cardiac and systolic indices, end-diastolic volume, while the ejection fraction remains stable, and general vascular tone decreases.
- In the second response, there’s a decrease in cardiac indices and blood flow, coupled with an increase in peripheral resistance. After 10 days of hypoxia training in a pressure chamber, the system's response to hypoxia was less intense but followed a similar trend.
Article Abstract
"Emergency" adaptation of the cardiovascular system of a healthy person to acute hypoxia produced by inspiration of a gas mixture containing 11% oxygen was accomplished in two ways: (a) with prevalence of the cardiac component, increase in the cardiac and systolic indices and end-diastolic volume in unaltered ejection fraction and diminished general vascular tonus; (b) with prevalence of the vascular component, decrease in the cardiac and systolic indices, end-diastolic volume, and muscular and skin blood flow and increase in peripheral resistance. After 10 days of training for hypoxia in a pressure chamber the reaction of the cardiorespiratory system to the hypoxia test was less pronounced but its trend was maintained.
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