Hypoxic ventilatory response in successful extreme altitude climbers
نویسندگان
چکیده
منابع مشابه
Hypoxic ventilatory response in successful extreme altitude climbers.
A very high ventilatory response to hypoxia is believed necessary to reach extreme altitude without oxygen. Alternatively, the excessive ventilation could be counterproductive by exhausting the ventilatory reserve early on. To test these alternatives, 11 elite climbers (2004 Everest-K2 Italian Expedition) were evaluated as follows: 1) at sea level, and 2) at 5,200 m, after 15 days of acclimatis...
متن کاملVentilation and hypoxic ventilatory response of Tibetan and Aymara high altitude natives.
Newcomers acclimatizing to high altitude and adult male Tibetan high altitude natives have increased ventilation relative to sea level natives at sea level. However, Andean and Rocky Mountain high altitude natives have an intermediate level of ventilation lower than that of newcomers and Tibetan high altitude natives although generally higher than that of sea level natives at sea level. Because...
متن کاملTime domains of the hypoxic ventilatory response.
The ventilatory response to hypoxia depends on the pattern and intensity of hypoxic exposure and involves several physiological mechanisms. These mechanisms differ in their effect (facilitation or depression) on different components of ventilation (tidal volume and frequency) and in their time course (seconds to years). Some mechanisms last long enough to affect future ventilatory responses to ...
متن کاملHypoxic ventilatory response and acute mountain sickness.
The acute ventilatory response to hypoxia (HVR) and to hypercapnia (CO2VR) was measured in 32 members of two mountaineering expeditions prior to their departure. Both teams made rapid ascents to their base camps at 5200 m and 4300 m and remained there for at least four days. Symptom scores for acute mountain sickness (AMS) were collected daily for these four days. There was a range of AMS from ...
متن کاملHypoxic Ventilatory Response and Breathlessness Following Hypocapnic
Study objectives: To investigate the etiology of posthyperventilation (post-HV) hypoxemia following voluntary hyperventilation (VHV), we examined the effects of hypocapnic (hypo-C02) and isocapnic (iso-C02) VHV on the hypoxic ventilatory response (02-response) and on the sensation of breathlessness during the 02-response. Methods: 02-responses and visual analog scale (VAS) scores for estimating...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: European Respiratory Journal
سال: 2006
ISSN: 0903-1936,1399-3003
DOI: 10.1183/09031936.06.00015805