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Heat stroke

W Xia, C D Mørch, D Matre, O K Andersen
BACKGROUND: This study aimed to explore conditioned pain modulation (CPM) effect on long-term potentiation (LTP)-like pain amplification induced by cutaneous 10-Hz conditioning electrical stimulation (CES). METHODS: Conditioned pain modulation was induced by cold pressor conditioning stimulus (CPCS) (4 °C) which was applied immediately before CES in the active session. In the control session, water with a temperature of 32 °C was used. Twenty subjects participated in two sessions in a randomized crossover design with at least 1-week interval...
October 20, 2016: European Journal of Pain: EJP
Osvaldo Marrero, Eric Y Hung, Manfred Hauben
BACKGROUND: Many illnesses demonstrate seasonal and geographic variations. Pharmacovigilance is unique among public health surveillance systems in terms of the clinical diversity of the events under surveillance. Since many pharmacovigilance signal detection methodologies are geared towards looking for increased frequency of spontaneous adverse drug event (ADE) reporting over variable time frames, seasonality of ADEs may have implications for signal detection. OBJECTIVE: The aim of this study was to investigate whether a set of illnesses that might be expected to display seasonality in general, did so when spontaneously reported as ADEs...
September 2016: Drugs—Real World Outcomes
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
L Chotorlishvili, M Azimi, S Stagraczyński, Z Toklikishvili, M Schüler, J Berakdar
A quantum thermodynamic cycle with a chiral multiferroic working substance such as LiCu_{2}O_{2} is presented. Shortcuts to adiabaticity are employed to achieve an efficient, finite-time quantum thermodynamic cycle, which is found to depend on the spin ordering. The emergent electric polarization associated with the chiral spin order, i.e., the magnetoelectric coupling, renders possible steering of the spin order by an external electric field and hence renders possible an electric-field control of the cycle...
September 2016: Physical Review. E
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
Ehud J Schmidt, Ronald D Watkins, Menekhem M Zviman, Michael A Guttman, Wei Wang, Henry A Halperin
BACKGROUND: Subjects undergoing cardiac arrest within a magnetic resonance imaging (MRI) scanner are currently removed from the bore and then from the MRI suite, before the delivery of cardiopulmonary resuscitation and defibrillation, potentially increasing the risk of mortality. This precludes many higher-risk (acute ischemic and acute stroke) patients from undergoing MRI and MRI-guided intervention. An MRI-conditional cardiac defibrillator should enable scanning with defibrillation pads attached and the generator ON, enabling application of defibrillation within the seconds of MRI after a cardiac event...
October 2016: Circulation. Cardiovascular Imaging
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
Enrico Marchetti, Pasquale Capone, Daniela Freda
INTRODUCTION: Climate change is a global emergency that influences human health and occupational safety. Global warming characterized by an increase in temperature of the ambience and humidity affects human health directly impairing body thermoregulation with serious consequences: dehydration, fatigue, heat stroke and even death. Several studies have demonstrated negative effects of climate change on working populations in a wide variety of workplaces with particular regard to outdoor and uncooled indoor workplaces...
July 2016: Annali Dell'Istituto Superiore di Sanità
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
Jennifer L Gordon, Jacqueline Johnson, Samantha Nau, Beth Mechlin, Susan S Girdler
OBJECTIVE: To examine the role of psychosocial factors in mediating the relationship between African American (AA) race and both increased pain sensitivity and blunted stress reactivity. METHODS: Participants included 133 AA and non-Hispanic white (nHW) individuals (mean [SD] age, 37 [9]) matched for age, sex, and socioeconomic status. Participants underwent mental stress testing (Trier Social Stress Test) while cardiovascular, hemodynamic, and neuroendocrine reactivity were measured...
September 23, 2016: Psychosomatic Medicine
Stephanie C Garbern, Laura G Ebbeling, Susan A Bartels
: Introduction Disaster and humanitarian responders are at-risk of experiencing a wide range of physical and psychological health conditions, from minor injuries to chronic mental health problems and fatalities. This article reviews the current literature on the major health outcomes of responders to various disasters and conflicts in order to better inform individuals of the risks and to inform deploying agencies of the health care needs of responders. METHODS: In March 2014, an EMBASE search was conducted using pre-defined search criteria...
September 19, 2016: Prehospital and Disaster 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,(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
M Bathaee, A R Bahrampour
We consider the power adiabatic stroke of the Otto optomechanical heat engine introduced in Phys. Rev. Lett. 112, 150602 (2014)PRLTAO0031-900710.1103/PhysRevLett.112.150602. We derive the maximum extractable work of both optomechanical normal modes in the minimum time while the system experiences quantum friction effects. We show that the total work done by the system in the power adiabatic stroke is optimized by a bang-bang control. The time duration of the power adiabatic stroke is of the order of the inverse of the effective optomechanical-coupling coefficient...
August 2016: Physical Review. E
Amit Druyan, Ran Yanovich, Yuval Heled
No abstract text is available yet for this article.
September 2016: Military Medicine
Daniel Gagnon, Steven A Romero, Hai Ngo, Satyam Sarma, William K Cornwell, Paula Y S Poh, Douglas Stoller, Benjamin D Levine, Craig G Crandall
During heat stress, stroke volume is maintained in young adults despite reductions in cardiac filling pressures. This is achieved by a general augmentation of cardiac function, highlighted by a left and upward shift of the Frank-Starling relation. In contrast, healthy aged adults are unable to maintain stroke volume during heat stress. We hypothesized that this would be associated with a lack of shift in the Frank-Starling relation. Frank-Starling relations were examined in 11 aged [69 ± 4 (SD) yr, 4 men/7 women] and 12 young (26 ± 5 yr, 6 men/6 women) adults during normothermic and heat stress (1...
October 1, 2016: Journal of Applied Physiology
A Rizzo, M Piccinno, L Lacitignola, G D'Onghia, G F D'Onghia, R L Sciorsci
This report describes an innovative unilateral ovariectomy technique for the surgical treatment of follicular cysts in dairy cows. Five cows, with a diagnosis of follicular cysts, were submitted to unilateral ovariectomy via a paralumbar fossa approach, in standing position. The linear cutter proved useful for clamping the ovary, stapling the vessels and cutting in one stroke, thus reducing surgery times. After unilateral ovariectomy, all cows underwent heat 7-30 days after surgery, and three cows became pregnant...
September 5, 2016: Veterinary Record
Mio Takayama, Masayuki Kashiwagi, Aya Matsusue, Brian Waters, Kenji Hara, Natsuki Ikematsu, Shin-Ichi Kubo
We report the quantification of immunohistochemical findings for a diagnosis of dementia in autopsy cases among older decedents. Autopsy cases were selected with the following requirements: >65yo; no head injuries, thermal injuries, or heat stroke; no intracranial lesions; and within 48h of death. Among cases that met all requirements, 10 had a clinical diagnosis of dementia were included in dementia group. Non-dementia group consisted of 38 cases without any record of dementia. To compare these groups, immunohistochemically, beta-amyloid, tau protein, gephyrin, and IL-33 were examined in five regions...
September 2016: Legal Medicine
Barbara Padalino, Sharanne L Raidal, Evelyn Hall, Peter Knight, Pietro Celi, Leo Jeffcott, Gary Muscatello
An online survey was conducted to determine associations between transport management and transport-related injuries and diseases in horses in Australia. The survey was composed of three sections: respondents' demographic information, transport management strategies or procedures (before, during and after transportation) and transport diseases experienced in the previous two year period. Univariate and multivariate modelling was performed exploring associations between variables (respondents' details and transport management strategies) and the following transport-related diseases as outcomes: traumatic injuries, diarrhoea, heat stroke, muscular problems, laminitis, transport pneumonia and colic...
2016: PloS One
Takahiro Satoh
Acquired idiopathic generalized anhidrosis (AIGA) is a sweating disorder characterized by inadequate sweating in response to heat stimuli such as high temperature, humidity, and physical exercise. Patients exhibit widespread nonsegmental hypohidrosis/anhidrosis without any apparent cause, but the palms, soles, and axillae are rarely affected. Heat stroke readily develops due to increased body temperature. AIGA commonly affects young males. Approximately 30-60% of patients show complications of cholinergic urticaria, also known as idiopathic pure sudomotor failure or hypohidrotic cholinergic urticaria...
2016: Current Problems in Dermatology
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