Knowledge Tree
Relations (1)
related 2.81 — strongly supporting 6 facts
Heart rate and ventilation are both physiological responses to hypoxic conditions that are analyzed together to determine their relative contributions to changes in oxygen saturation, as evidenced by [1], [2], and [3]. Studies frequently compare these two metrics across sexes to understand how they adjust during exercise or exposure to low oxygen levels, as detailed in [4], [5], and [6].
Facts (6)
Sources
Sex differences in cardiorespiratory control under hypoxia - Frontiers frontiersin.org 3 facts
claimExposure to iso-saturation hypoxia causes increases in heart rate, cardiac output, low-frequency bands of R-R intervals, blood pressure, tidal volume, and ventilation, while causing decreases in baroreflex sensitivity, total power, and the high-frequency band of R-R intervals.
claimWhen analyzing sex as a factor in iso-saturation hypoxia, females exhibit a higher heart rate and cardiac output index, but lower tidal volume, ventilation, and low-frequency band of blood pressure compared to males.
claimUnder iso-time hypoxia, females exhibit higher heart rates, cardiac output, and total vascular conductance, while males exhibit higher tidal volume, ventilation, and low-frequency bands of blood pressure.
Sex differences in respiratory and circulatory cost during hypoxic ... nature.com 3 facts
measurementThe relative contributions of energy expenditure (EE), ventilation (VE), and heart rate (HR) to the change in oxygen saturation (ΔSpO2) under hypoxic conditions differ by sex: in women, the effects of EE (28.1% vs 15.8% in men) and VE (4.1% vs 1.7% in men) were greater, while in men, the contribution of HR was greater (82.5% vs 67.9% in women).
procedureHypoxia-induced changes in energy expenditure (ΔEE), ventilation (ΔVE), and heart rate (ΔHR) are calculated by subtracting normoxic values from hypoxic values at the same walking speed, with calculations performed separately for men and women.
claimThe study hypothesized that women would experience greater arterial hypoxemia than men, and that the contribution rates of energy expenditure, ventilation, and heart rate in response to changes in oxygen saturation would differ between the sexes.