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https://www.readbyqxmd.com/read/27909226/unique-cytokine-and-chemokine-responses-to-exertional-heat-stroke-in-mice
#1
Michelle A King, Lisa R Leon, Deborah A Morse, Thomas L Clanton
In heat stroke, cytokines are believed to play important roles in multi-organ dysfunction and recovery of damaged tissue. The time course of the cytokine response is well defined in passive heat stroke (PHS), but little is known about exertional heat stroke (EHS). In this study we used a recently developed mouse EHS model to measure the responses of circulating cytokines/chemokines and cytokine gene expression in muscle. A very rapid increase in circulating IL-6 was observed at max core temperature (Tc,max) that peaked at 0...
December 1, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27878491/possible-cause-of-nonlinear-tension-rise-in-activated-muscle-fiber-during-stretching
#2
P V Kochubei, S Yu Bershitsky
Tension in contracting muscle fiber under conditions of ramp stretching rapidly increases, but after reaching a critical stretch Pc sharply decreases. To find out the cause of these changes in muscle fiber tension, we stopped stretching before and after reaching Pc and left the fiber stretched for 50 msec. After rapid tension drop, the transient tension rise not accompanied by fiber stiffness increase was observed only in fibers heated to 25°C and stretched to Pc. Under other experimental conditions, this growth was absent...
November 22, 2016: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/27874299/cooling-effectiveness-of-a-modified-cold-water-immersion-method-after-exercise-induced-hyperthermia
#3
Katherine E Luhring, Cory L Butts, Cody R Smith, Jeffrey A Bonacci, Ramon C Ylanan, Matthew S Ganio, Brendon P McDermott
CONTEXT:  Recommended treatment for exertional heat stroke includes whole-body cold-water immersion (CWI). However, remote locations or monetary or spatial restrictions can challenge the feasibility of CWI. Thus, the development of a modified, portable CWI method would allow for optimal treatment of exertional heat stroke in the presence of these challenges. OBJECTIVE:  To determine the cooling rate of modified CWI (tarp-assisted cooling with oscillation [TACO]) after exertional hyperthermia...
November 22, 2016: Journal of Athletic Training
https://www.readbyqxmd.com/read/27869135/heat-stroke-internet-searches-can-be-a-new-heatwave-health-warning-surveillance-indicator
#4
Tiantian Li, Fan Ding, Qinghua Sun, Yi Zhang, Patrick L Kinney
The impact of major heatwave shocks on population morbidity and mortality has become an urgent public health concern. However, Current heatwave warning systems suffer from a lack of validation and an inability to provide accurate health risk warnings in a timely way. Here we conducted a correlation and linear regression analysis to test the relationship between heat stroke internet searches and heat stroke health outcomes in Shanghai, China, during the summer of 2013. We show that the resulting heatstroke index captures much of the variation in heat stroke cases and deaths...
November 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27849463/core-temperature-in-service-members-with-and-without-traumatic-amputations-during-a-prolonged-endurance-event
#5
Anne M Andrews, Christina Deehl, Reva L Rogers, Alison L Pruziner
INTRODUCTION: Service members with traumatic amputations may be at an increased risk of elevated core body temperature, since their ability to dissipate heat may decrease with the reduction in body surface area (BSA) after injury. Elevated core temperature can impair physical performance during combat operations potentially putting the service members and their teams at risk. The purpose of this study was to compare core temperature between individuals with and without amputations during a prolonged endurance event...
November 2016: Military Medicine
https://www.readbyqxmd.com/read/27846153/look-beyond-thermoregulation-and-hydration-in-the-diagnosis-of-heat-stroke
#6
Chin Leong Lim
No abstract text is available yet for this article.
December 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27832001/scaling-the-low-shear-pulsatile-torvad-for-pediatric-heart-failure
#7
Jeffrey R Gohean, Erik R Larson, Brian H Hsi, Mark Kurusz, Richard W Smalling, Raul G Longoria
This article provides an overview of the design challenges associated with scaling the low-shear pulsatile TORVAD ventricular assist device (VAD) for treating pediatric heart failure. A cardiovascular system model was used to determine that a 15 ml stroke volume device with a maximum flow rate of 4 L/min can provide full support to pediatric patients with body surface areas between 0.6 to 1.5 m2. Low shear stress in the blood is preserved as the device is scaled down and remains at least two orders of magnitude less than continuous flow VADs...
November 9, 2016: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/27785365/a-bibliometric-analysis-of-exertional-heat-stroke-research-in-web-of-science
#8
Zhi Mao, Chao Liu, Shuo Chen, Zheng-Guo Zhu, Hong-Jun Kang, Fei-Hu Zhou
BACKGROUND: Exertional heat stroke is a fatal condition and remains a health problem. This paper evaluates the publication trend regarding exertional heat stroke research between 1996 and 2015 using a bibliometric method. METHOD: Articles regarding exertional heat stroke research published between 1996 and December 2015 were searched for in the SCI-EXPANDED database of Web of Science. The search results were analyzed with regard to publication year; publication quantity regarding countries/regions, and authors; citation frequency; and journal distribution...
2016: Military Medical Research
https://www.readbyqxmd.com/read/27781140/mesenchymal-stem-cell-based-treatments-for-stroke-neural-trauma-and-heat-stroke
#9
REVIEW
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
https://www.readbyqxmd.com/read/27777944/phytochemical-screening-and-antinociceptive-and-antidiarrheal-activities-of-hydromethanol-and-petroleum-benzene-extract-of-microcos-paniculata-barks
#10
Rafath Ara Moushome, Mst Irin Akter, Md Abdullah Aziz
Introduction. Microcos paniculata is traditionally used for treating diarrhea, wounds, cold, fever, hepatitis, dyspepsia, and heat stroke. Objective. To investigate the qualitative phytochemical constituents of hydromethanol (HMPB) and petroleum benzene extract of Microcos paniculata barks (PBMPB) and to evaluate their antinociceptive and antidiarrheal activities. Methods. Phytochemical constituents and antinociceptive and antidiarrheal activities were determined and evaluated by different tests such as Molisch's, Fehling's, Mayer's, Wagner's, Dragendorff's, frothing, FeCl3, alkali, Pew's, and Salkowski's test, general test of glycosides, Baljet and NH4OH test, formalin-induced paw licking, acetic acid-induced writhing, tail immersion, and hot plate tests, and castor oil and MgSO4 induced diarrheal tests...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27777645/targeting-glial-mitochondrial-function-for-protection-from-cerebral-ischemia-relevance-mechanisms-and-the-role-of-micrornas
#11
Le Li, Creed M Stary
Astrocytes and microglia play crucial roles in the response to cerebral ischemia and are effective targets for stroke therapy in animal models. MicroRNAs (miRs) are important posttranscriptional regulators of gene expression that function by inhibiting the translation of select target genes. In astrocytes, miR expression patterns regulate mitochondrial function in response to oxidative stress via targeting of Bcl2 and heat shock protein 70 family members. Mitochondria play an active role in microglial activation, and miRs regulate the microglial neuroinflammatory response...
2016: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/27773717/cardioprotective-effects-of-monocyte-locomotion-inhibitory-factor-on-myocardial-ischemic-injury-by-targeting-vimentin
#12
Shu Jiang, Yulan Liu, Jing Wang, Yue Zhang, Yaocheng Rui, Yuefan Zhang, Tiejun Li
Monocyte locomotion inhibitory factor (MLIF), a heat-stable pentapeptide produced by Entamoeba histolytica, has anti-inflammatory function and protective effect on ischemic stroke. In this study, we evaluated the effect of MLIF on myocardial ischemia. The myocardial ischemia reperfusion (I/R) model was established by ligation of the left anterior descending branch (LAD) using 8-0 silk suture for 30min followed by 3h reperfusion in mice. After sacrifice, the serum concentrations of cardiac troponin I (cTnI), creatine kinase (CK), lactate dehydrogenase (LDH) as well as the heart infarct size were measured...
October 20, 2016: Life Sciences
https://www.readbyqxmd.com/read/27766711/exploration-of-conditioned-pain-modulation-effect-on-long-term-potentiation-like-pain-amplification-in-humans
#13
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
https://www.readbyqxmd.com/read/27747826/seasonal-and-geographic-variation-in-adverse-event-reporting
#14
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
https://www.readbyqxmd.com/read/27740656/shape-memory-polymer-nanocomposites-with-a-3d-conductive-network-for-bidirectional-actuation-and-locomotion-application
#15
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
https://www.readbyqxmd.com/read/27739759/superadiabatic-quantum-heat-engine-with-a-multiferroic-working-medium
#16
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
https://www.readbyqxmd.com/read/27737279/exertional-heat-stroke-and-american-football-what-the-team-physician-needs-to-know
#17
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
https://www.readbyqxmd.com/read/27729363/a-magnetic-resonance-imaging-conditional-external-cardiac-defibrillator-for-resuscitation-within-the-magnetic-resonance-imaging-scanner-bore
#18
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
https://www.readbyqxmd.com/read/27704519/exertional-heat-stroke-about-4-cases
#19
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
https://www.readbyqxmd.com/read/27698292/climate-change-impact-on-microclimate-of-work-environment-related-to-occupational-health-and-productivity
#20
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
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