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Exertional heat stroke

Yogi Chang-Yo Hsuan, Cheng-Hsien Lin, Ching-Ping Chang, Mao-Tsun Lin
BACKGROUND: Mesenchymal stem cell (MSC) transplantation has been reported to improve neurological function following neural injury. Many physiological and molecular mechanisms involving MSC therapy-related neuroprotection have been identified. METHODS: A review is presented of articles that pertain to MSC therapy and diverse brain injuries including stroke, neural trauma, and heat stroke, which were identified using an electronic search (e.g., PubMed), emphasize mechanisms of MSC therapy-related neuroprotection...
October 2016: Brain and Behavior
Qingyu Peng, Hongqiu Wei, Yuyang Qin, Zaishan Lin, Xu Zhao, Fan Xu, Jinsong Leng, Xiaodong He, Anyuan Cao, Yibin Li
Electrical stimulation of shape-memory polymers (SMPs) has many advantages over thermal methods; creating an efficient conductive path through the bulk polymers is essential for developing high performance electroactive systems. Here, we show that a three-dimensional (3D) porous carbon nanotube sponge can serve as a built-in integral conductive network to provide internal, homogeneous, in situ Joule heating for shape-memory polymers, thus significantly improving the mechanical and thermal behavior of SMPs. As a result, the 3D nanocomposites show a fast response and produce large exerting forces (with a maximum flexural stress of 14...
October 14, 2016: Nanoscale
Jillian E Sylvester, Luke N Belval, Douglas J Casa, Francis G O'Connor
Football is recognized as a leading contributor to sports injury secondary to the contact collision nature of the endeavor. While direct deaths from head and spine injury remain a significant contributor to the number of catastrophic injuries, indirect deaths (systemic failure) predominate. Exertional heat stroke has emerged as one of the leading indirect causes of death in high school and collegiate football. This review details for the team physician the unique challenge of exercising in the heat to the football player, and the prevention, diagnosis, management, and return-to-play issues pertinent to exertional heat illnesses...
September 2016: American Journal of Orthopedics
Mohamed Taha Khoufi, Ali Mrabet, Abderraouf Ben Mansour, Khaled Lamine, Mustapha Ferjani, Mondher Yedeas
Exertional heat stroke is defined as hyperthermia associated with neurological signs related to intense physical activity performed in a hot environment. This is a medical emergency and life-threatening. In this study, we investigated four cases of exertional heat stroke hospitalized at the military hospital in Tunis (Tunisia) to describe the clinical, therapeutic and preventive characteristics and factors favoring this disease. Four young soldiers, 23 to 44 years older, have developed Exertional heat stroke after Intense and prolonged exercise...
April 2016: La Tunisie Médicale
Ko-Onn Lee, Chin-Meng Khoo, Balram Chowbay, Yiong-Huak Chan, Meng-Kwoon Sim
Des-aspartate-angiotensin I (DAA-I) is an endogenous angiotensin peptide and a prototype angiotensin receptor agonist (ARA). It acts on the angiotensin AT1 receptor and antagonises the deleterious actions of angiotensin II. DAA-I attenuates animal models of human disease in which angiotensin II has been implicated, such as cardiac hypertrophy, neointima formation, arteriosclerosis, renal failure, post-infarction injuries, diabetes, viral infection, chemical-induced inflammation, heat stroke, cancer, and gamma radiation lethality...
September 28, 2016: Drugs in R&D
Tyler T Truxton, Kevin C Miller
Clinical Scenario Exertional heat stroke (EHS) is a medical emergency which, if left untreated, can result in death. The standard of care for EHS patients includes confirmation of hyperthermia via rectal temperature (Trec) and then immediate cold-water immersion (CWI). While CWI is the fastest way to reduce Trec,(1,2) it may be difficult to lower and maintain water bath temperature in the recommended ranges (1.7°C-15°C [35°F-59°F])(1) because of limited access to ice and/or the bath being exposed to high ambient temperatures for long periods of time...
August 24, 2016: Journal of Sport Rehabilitation
Megan L Keen, Kevin C Miller
: Clinical Scenario: Exercise performed in hot and humid environments increases core body temperature (TC). If TC exceeds 40°C for prolonged periods of time, exertional heat stroke (EHS) may occur. EHS is one of the leading causes of sudden death in athletes. Mortality and morbidity increase the longer the patient's TC remains above 40°C; thus, it is imperative to initiate cooling as quickly as possible. "Acceptable" cooling rates in EHS situations are between 0.08°C·min-1 and 0.15°C·min-1 while "ideal" cooling rates are above 0...
August 24, 2016: Journal of Sport Rehabilitation
Amit Druyan, Ran Yanovich, Yuval Heled
No abstract text is available yet for this article.
September 2016: Military Medicine
Emma A Nye, Jessica R Edler, Lindsey E Eberman, Kenneth E Games
UNLABELLED: Reference: Zhang Y, Davis JK, Casa DJ, Bishop PA. Optimizing cold water immersion for exercise-induced hyperthermia: a meta-analysis. Med Sci Sports Exerc. 2015;47(11):2464-2472. Clinical Questions: Do optimal procedures exist for implementing cold-water immersion (CWI) that yields high cooling rates for hyperthermic individuals? DATA SOURCES: One reviewer performed a literature search using PubMed and Web of Science. Search phrases were cold water immersion, forearm immersion, ice bath, ice water immersion, immersion, AND cooling...
June 2, 2016: Journal of Athletic Training
Berliz Adato, Gal Dubnov-Raz, Hadas Gips, Yuval Heled, Yoram Epstein
UNLABELLED: A common and unfortunate cause for heat stroke-related deaths in children is entrapment in closed vehicles. The aim of this study was to analyze the pathological consequences of such grave events. Autopsy reports of all children that were brought to a national forensic medicine center after being found dead in closed vehicles over a 21-year period (1995-2015) were reviewed. Data extracted were the circumstances of the events, child age, sex, height and weight, time, date and duration of entrapment, and environmental temperatures at the time of entrapment and the autopsy findings...
September 2016: European Journal of Pediatrics
Yunpeng Lou, Hongping Wang, Hailing Li, Wei Chen, Ning Sha
No abstract text is available yet for this article.
August 2016: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
Bancha Satirapoj, Suramanat Kongthaworn, Panbubpa Choovichian, Ouppatham Supasyndh
BACKGROUND: Exertional heat stroke (EHS) is a life-threatening illness and leads to multi-organ dysfunction including acute kidney injury (AKI). The clinical significance of abnormal electrolytes and renal outcomes in ESH patients has been poorly documented. We aim to exhibit the electrolyte abnormalities, renal outcomes and risk factors of patients with AKI receiving dialysis in EHS. METHODS: A retrospective cohort study in EHS patients between 2003 and 2014 were conducted...
2016: BMC Nephrology
Jason Glaser, Jay Lemery, Balaji Rajagopalan, Henry F Diaz, Ramón García-Trabanino, Gangadhar Taduri, Magdalena Madero, Mala Amarasinghe, Georgi Abraham, Sirirat Anutrakulchai, Vivekanand Jha, Peter Stenvinkel, Carlos Roncal-Jimenez, Miguel A Lanaspa, Ricardo Correa-Rotter, David Sheikh-Hamad, Emmanuel A Burdmann, Ana Andres-Hernando, Tamara Milagres, Ilana Weiss, Mehmet Kanbay, Catharina Wesseling, Laura Gabriela Sánchez-Lozada, Richard J Johnson
Climate change has led to significant rise of 0.8°C-0.9°C in global mean temperature over the last century and has been linked with significant increases in the frequency and severity of heat waves (extreme heat events). Climate change has also been increasingly connected to detrimental human health. One of the consequences of climate-related extreme heat exposure is dehydration and volume loss, leading to acute mortality from exacerbations of pre-existing chronic disease, as well as from outright heat exhaustion and heat stroke...
August 8, 2016: Clinical Journal of the American Society of Nephrology: CJASN
Christopher J Tyler, Tom Reeve, Gary J Hodges, Stephen S Cheung
BACKGROUND: Exercise performance and capacity are impaired in hot, compared to temperate, conditions. Heat adaptation (HA) is one intervention commonly adopted to reduce this impairment because it may induce beneficial exercise performance and physiological and perceptual adaptations. A number of investigations have been conducted on HA but, due to large methodological differences, the effectiveness of different HA regimens remain unclear. OBJECTIVES: (1) To quantify the effect of different HA regimens on exercise performance and the physiological and perceptual responses to subsequent heat exposure...
April 22, 2016: Sports Medicine
Jon K Davis, Lindsay B Baker, Kelly Barnes, Corey Ungaro, John Stofan
Numerous studies have reported on the thermoregulation and hydration challenges athletes face in team and individual sports during exercise in the heat. Comparatively less research, however, has been conducted on the American Football player. Therefore, the purpose of this article is to review data collected in laboratory and field studies and discuss the thermoregulation, fluid balance, and sweat losses of American Football players. American Football presents a unique challenge to thermoregulation compared with other sports because of the encapsulating nature of the required protective equipment, large body size of players, and preseason practice occurring during the hottest time of year...
October 2016: Sports Medicine
Buddhika T B Wijerathne, Senaka D Pilapitiya, Vadivel Vijitharan, Mohammed M F Farah, Yashodhara V M Wimalasooriya, Sisira H Siribaddana
BACKGROUND: Heat stroke is a life-threatening condition with exertional heat stroke occurring frequently among soldiers and athletes. Because of its common occurrence, many military trainees practice preventive measures prior to any activity requiring severe exertion. Although it is said to be common in practice, different presentations of heat stroke are scarcely described in literature. CASE PRESENTATION: We describe a case of an exertional heat stroke in a 23-year-old male Sinhalese soldier who developed early changes of renal failure, liver failure and rhabdomyolysis...
2016: Military Medical Research
Casper Reske-Nielsen, Katherine Schlosser, Robert C Pascucci, James A Feldman
BACKGROUND: Heat stroke, heat-related illness, and malignant hyperthermia all present with hyperthermia. The former two are common presentations in the emergency department (ED). On the other hand, malignant hyperthermia (MH) is an uncommon but equally dangerous condition that requires prompt recognition and specific treatment with dantrolene sodium and avoidance of certain medications to reduce morbidity and mortality. Recent research focusing on nonanesthetic or exercise-induced MH has demonstrated a relationship between certain gene mutations and malignant hyperthermia susceptibility...
August 2016: Journal of Emergency Medicine
Tyler T Truxton, Kevin C Miller
Clinical Scenario: Exertional heat stroke (EHS) is a medical emergency which, if left untreated, can result in death. The standard of care for EHS patients includes confirmation of hyperthermia via rectal temperature (Trec) and then immediate cold-water immersion (CWI). While CWI is the fastest way to reduce Trec, it may be difficult to lower and maintain water bath temperature in the recommended ranges (1.7°C-15°C [35°F-59°F]) because of limited access to ice and/or the bath being exposed to high ambient temperatures for long periods of time...
March 21, 2016: Journal of Sport Rehabilitation
Ana Sofia Carvalho, Simão C Rodeia, Joana Silvestre, Pedro Póvoa
Heat stroke (HS) is defined as a severe elevation of core body temperature along with central nervous system dysfunction. Exertional heat stroke (EHS) with acute liver failure (ALF) is a rare condition. The authors report the case of a 25-year-old man with a history of cognitive enhancers' intake who developed hyperthermia and neurological impairment while running an outdoor marathon. The patient was cooled and returned to normal body temperature after 6 h. He subsequently developed ALF and was transferred to the intensive care unit...
2016: BMJ Case Reports
Cory L Butts, Brendon P McDermott, Brian J Buening, Jeffrey A Bonacci, Matthew S Ganio, J D Adams, Matthew A Tucker, Stavros A Kavouras
CONTEXT: Exercise conducted in hot, humid environments increases the risk for exertional heat stroke (EHS). The current recommended treatment of EHS is cold-water immersion; however, limitations may require the use of alternative resources such as a cold shower (CS) or dousing with a hose to cool EHS patients. OBJECTIVE: To investigate the cooling effectiveness of a CS after exercise-induced hyperthermia. DESIGN: Randomized, crossover controlled study...
March 2016: Journal of Athletic Training
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