1987
DOI: 10.1152/jappl.1987.62.4.1538
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Effect of sodium depletion on peripheral vascular responses to heat stress in baboons

Abstract: The cutaneous vasodilation and renal vasoconstriction in baboons during environmental heating (EH) appear to be produced predominantly by sympathetic vasoconstrictor withdrawal and activation of the renin-angiotensin system, respectively. Since these mechanisms may be influenced differently by sodium depletion, this study examined the hypothesis that sodium depletion would have a differential effect on cutaneous and renal vascular responses to EH. Sodium depletion was produced in chronically instrumented baboo… Show more

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Cited by 7 publications
(5 citation statements)
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“…The baboon has the largest recorded renal vascular response to heat stress in this group. A progressive decrease in renal blood flow of 27%-36% and an increase in renal vascular resistance of 40%-80% occurred as internal temperature increased 1 .So-3.0"C (98,196,198) (Fig. 11.6).…”
Section: Renal Circulationmentioning
confidence: 95%
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“…The baboon has the largest recorded renal vascular response to heat stress in this group. A progressive decrease in renal blood flow of 27%-36% and an increase in renal vascular resistance of 40%-80% occurred as internal temperature increased 1 .So-3.0"C (98,196,198) (Fig. 11.6).…”
Section: Renal Circulationmentioning
confidence: 95%
“…The renal vascular response to whole-body heating has been examined in unanesthetized baboons (49,98,198), sheep (88), dogs (93), rabbits (203), and rats (146)(147)(148). Renal blood flow decreases and renal vascular resistance increases in all of these species except the dog (93,121).…”
Section: Renal Circulationmentioning
confidence: 99%
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“…Specifically, the rate of evaporative water loss is reduced following thermally induced dehydration in many species, including humans (84-86, 221,227), dogs (19), camels (217), goats (17), and cats (18,72). In addition, peak cutaneous vasodilation is reduced in dehydrated humans (86) and nonhuman primates (250) but not in sodium-depleted baboons (190). Fortney et al (84) showed that the esophageal temperature (T,,) threshold for cutaneous vasodilation increased after isotonic hypovolemia induced by diuretics and that the increase in sweat rate per unit increase in T,, was also attenuated.…”
Section: The Organizatton Of Body Water and Its Ionicmentioning
confidence: 99%