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Thermoregulatory capacity of the Thoroughbred racehorse and its relationship to the pathogenesis of exertional heat illness
Equine Veterinary Education ( IF 0.9 ) Pub Date : 2020-12-11 , DOI: 10.1111/eve.13433
M. A. Brownlow 1 , J. X. Mizzi 2
Affiliation  

When racehorses fail to thermoregulate effectively, whether due to intrinsic or extrinsic factors, a condition called exertional heat illness (EHI) may occur, which can be life-threatening and represents a significant welfare issue. Horses usually become affected in the recovery phase soon after racing, so that a knowledge of the ‘normal’ thermoregulatory processes which operate at this time and their variations is essential to enable early detection of EHI. Racing in hot or warm and humid weather conditions represents the upper extreme of thermoregulatory variations, and observations on how horses normally recover at the racetrack may provide a clearer perspective on the physiology of that process for all sports horses. This review focuses on the post-exercise thermoregulatory capacity of the Thoroughbred racehorse, with a view to understanding the physiological mechanisms that should efficiently dissipate excess heat. The clinical manifestations of exertional heat illness are due to inadequate or harmful physiological responses, and if recognised and treated early can be effectively curtailed.

中文翻译:

纯种赛马的体温调节能力及其与劳力性热病发病机制的关系

当赛马无法有效调节体温时,无论是由于内在因素还是外在因素,都可能出现一种称为劳累性热病 (EHI) 的疾病,这可能会危及生命并代表重大的福利问题。马通常在赛后不久的恢复阶段就会受到影响,因此了解此时运行的“正常”体温调节过程及其变化对于早期检测 EHI 至关重要。在炎热或温暖潮湿的天气条件下比赛代表体温调节变化的上限,观察马匹在赛马场上正常恢复的情况可能会为所有运动马匹的生理过程提供更清晰的视角。本综述重点关注纯种赛马的运动后体温调节能力,以了解应有效消散多余热量的生理机制。劳力性热病的临床表现是由于生理反应不充分或有害,如果早期发现和治疗,可以有效减少。
更新日期:2020-12-11
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