Selected contribution: Ventilatory response to CO2 in high-altitude natives and patients with chronic mountain sickness

The ventilatory responses to CO(2) of high-altitude (HA) natives and patients with chronic mountain sickness (CMS) were studied and compared with sea-level (SL) natives living at SL. A multifrequency binary sequence (MFBS) in end-tidal Pco(2) was employed to separate the fast (peripheral) and slow (...

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Veröffentlicht in:Journal of applied physiology (1985) 2003-03, Vol.94 (3), p.1279-87; discussion 1253-4
Hauptverfasser: Fatemian, Marzieh, Gamboa, Alfredo, Léon-Velarde, Fabiola, Rivera-Ch, Maria, Palacios, Jose-Antonio, Robbins, Peter A
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container_end_page 87; discussion 1253-4
container_issue 3
container_start_page 1279
container_title Journal of applied physiology (1985)
container_volume 94
creator Fatemian, Marzieh
Gamboa, Alfredo
Léon-Velarde, Fabiola
Rivera-Ch, Maria
Palacios, Jose-Antonio
Robbins, Peter A
description The ventilatory responses to CO(2) of high-altitude (HA) natives and patients with chronic mountain sickness (CMS) were studied and compared with sea-level (SL) natives living at SL. A multifrequency binary sequence (MFBS) in end-tidal Pco(2) was employed to separate the fast (peripheral) and slow (central) components of the chemoreflex response. MFBS was imposed against a background of both euoxia (end-tidal Po(2) of 100 Torr) and hypoxia (52.5 Torr). Both total and central chemoreflex sensitivity to CO(2) in euoxia were higher in HA and CMS subjects compared with SL subjects. Peripheral chemoreflex sensitivity to CO(2) in euoxia was higher in HA subjects than in SL subjects. Hypoxia induced a greater increase in total chemoreflex sensitivity to CO(2) in SL subjects than in HA and CMS subjects, but peripheral chemoreflex sensitivity to CO(2) in hypoxia was no greater in SL subjects than in HA and CMS subjects. Values for the slow (central) time constant were significantly greater for HA and CMS subjects than for SL subjects.
doi_str_mv 10.1152/japplphysiol.00859.2002
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source MEDLINE; American Physiological Society; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection
subjects Adult
Altitude
Altitude Sickness - physiopathology
Carbon dioxide
Carbon Dioxide - blood
Carbon Dioxide - pharmacology
Central Nervous System - drug effects
Chemoreceptor Cells - drug effects
Female
Humans
Male
Models, Biological
Native peoples
Oxygen - blood
Peripheral Nervous System - drug effects
Reflex - drug effects
Respiratory diseases
Respiratory Mechanics - drug effects
Respiratory Mechanics - physiology
Respiratory system
title Selected contribution: Ventilatory response to CO2 in high-altitude natives and patients with chronic mountain sickness
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