Effect of hypoxia on arterial potassium concentration at rest and during exercise in man.

Abstract:

:Hypoxia has been reported to increase arterial potassium concentration ([K+]a) in anaesthetized cats (Paterson, Estavillo & Nye, 1988). The purpose of this study was to determine whether this phenomenon occurs in humans. The effect of hypoxia on [K+]a was measured in ten male subjects, at rest and during light exercise, before and after 8 weeks of physical training. The [K+]a increased by 0.15 +/- 0.04 mM (mean +/- S.E.M.) at rest, when end-tidal PO2 (PET,O2) was lowered from 100 to 51 +/- 1.6 Torr, and by 0.10 +/- 0.02 mM during exercise, when PET,O2 was lowered from 100 to 66 +/- 6.2 Torr. Physical training did not alter the rise in [K+]a significantly. The magnitude of this effect is small in comparison with that of exercise-induced hyperkalaemia, and is unlikely to be of great physiological significance at moderate levels of hypoxia.

journal_name

Exp Physiol

journal_title

Experimental physiology

authors

Barlow CW,Qayyum MS,Davey PP,Paterson DJ,Robbins PA

doi

10.1113/expphysiol.1994.sp003759

subject

Has Abstract

pub_date

1994-03-01 00:00:00

pages

257-60

issue

2

eissn

0958-0670

issn

1469-445X

journal_volume

79

pub_type

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