Temperature and blood flow distribution in the human leg during passive heat stress

Journal of Applied Physiology
Scott T ChiesaJosé González-Alonso

Abstract

The influence of temperature on the hemodynamic adjustments to direct passive heat stress within the leg's major arterial and venous vessels and compartments remains unclear. Fifteen healthy young males were tested during exposure to either passive whole body heat stress to levels approaching thermal tolerance [core temperature (Tc) + 2°C; study 1; n = 8] or single leg heat stress (Tc + 0°C; study 2; n = 7). Whole body heat stress increased perfusion and decreased oscillatory shear index in relation to the rise in leg temperature (Tleg) in all three major arteries supplying the leg, plateauing in the common and superficial femoral arteries before reaching severe heat stress levels. Isolated leg heat stress increased arterial blood flows and shear patterns to a level similar to that obtained during moderate core hyperthermia (Tc + 1°C). Despite modest increases in great saphenous venous (GSV) blood flow (0.2 l/min), the deep venous system accounted for the majority of returning flow (common femoral vein 0.7 l/min) during intense to severe levels of heat stress. Rapid cooling of a single leg during severe whole body heat stress resulted in an equivalent blood flow reduction in the major artery supplying the thigh deep tissues onl...Continue Reading

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Citations

Jun 2, 2017·The Journal of Physiology·Scott T ChiesaSteven J Trangmar
Apr 19, 2017·Exercise and Sport Sciences Reviews·Steven J Trangmar, José González-Alonso
Nov 9, 2017·Journal of Exercise Rehabilitation·Víctor L Escamilla-GalindoManuel Sillero-Quintana
Nov 12, 2016·American Journal of Physiology. Heart and Circulatory Physiology·Steven A RomeroCraig G Crandall
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Aug 8, 2018·European Journal of Applied Physiology·Anna OueYoshimitsu Inoue
Jan 24, 2019·Sports Medicine·Steven J Trangmar, José González-Alonso
Jun 24, 2016·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Dustin NeffBruno T Roseguini
Jul 1, 2016·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Alisha M KuhlenhoelterBruno T Roseguini
Dec 23, 2016·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Kate N ThomasJames D Cotter
Jan 24, 2020·Journal of Applied Physiology·Kyoungrae KimBruno T Roseguini
May 1, 2020·Journal of Applied Physiology·Kyoungrae KimBruno T Roseguini
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Aug 20, 2021·Experimental Physiology·Katherine L ShieldsRussell S Richardson
Jun 10, 2021·Medicine and Science in Sports and Exercise·Kyoungrae KimBruno T Roseguini
Oct 15, 2021·Experimental Physiology·Nuno Koch Esteves, Scott T Chiesa
Oct 14, 2021·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Emily A LarsonChristopher T Minson

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