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High Altitude Medicine & Biology

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https://www.readbyqxmd.com/read/28530447/middle-ear-function-and-pathophysiology-in-andean-children-living-at-high-altitudes
#1
S Allen Counter, Leo H Buchanan, Fernando Ortega, Anthony B Jacobs, Göran Laurell
Counter, S. Allen, Leo H. Buchanan, Fernando Ortega, Anthony B. Jacobs, and Göran Laurell. Middle ear function and pathophysiology in Andean children living at high altitudes. High Alt Med Biol 00:000-000, 2017.-The extent of altitude-related middle ear disorders in children native to high altitudes is unclear. This study examined middle ear pathophysiology in two groups of children living in high-altitude Ecuadorian Andean communities by investigating middle ear pressure (MEP), tympanic membrane compliance (TMC), and ear canal volume (ECV) using tympanometry, and by otological examination...
May 22, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28509579/findings-of-cognitive-impairment-at-high-altitude-relationships-to-acetazolamide-use-and-acute-mountain-sickness
#2
Lara Phillips, Buddha Basnyat, Yuchiao Chang, Erik R Swenson, N Stuart Harris
Phillips, Lara, Buddha Basnyat, Yuchiao Chang, Erik R. Swenson, and N. Stuart Harris. Findings of cognitive impairment at high altitude: relationships to acetazolamide use and acute mountain sickness. High Alt Med Biol. 00:000-000, 2017.-Objective: Acute mountain sickness (AMS) is defined by patient-reported symptoms using the Lake Louise Score (LLS), which provides limited insight into any possible underlying central nervous system (CNS) dysfunction. Some evidence suggests AMS might coexist with altered neural functioning...
May 16, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28486037/role-of-arcuate-nucleus-in-the-regulation-of-feeding-behavior-in-the-process-of-altitude-acclimatization-in-rats
#3
Xiang-Wen Liu, Jie Yin, Qi-Sheng Ma, Chu-Chu Qi, Ji-Ying Mu, Lang Zhang, Li-Ping Gao, Yu-Hong Jing
Liu, Xiang-Wen, Jie Yin, Qi-Sheng Ma, Chu-Chu Qi, Ji-Ying Mu, Lang Zhang, Li-Ping Gao, and Yu-Hong Jing. Role of arcuate nucleus in the regulation of feeding behavior in the process of altitude acclimatization in rats. High Alt Med Biol. 00:000-000, 2017.-Highly efficient energy utilization and metabolic homeostasis maintenance rely on neuromodulation. Altitude exposure is known to stimulate neuroendocrine systems to respond to acute hypoxia and adaptive acclimatization. However, limited data on how the adaptive regulation of the arcuate nucleus performs in the process of altitude acclimatization are available...
May 9, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28485995/congenital-heart-disease-and-high-altitude-is-chronic-hypoxia-a-common-factor-in-intellectual-impairment
#4
Laxmi V Ghimire
No abstract text is available yet for this article.
May 9, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28481626/retinal-hemorrhage-in-a-high-altitude-aid-post-volunteer-doctor-a-case-report
#5
Sanjeeb Sudarshan Bhandari, Pranawa Koirala, Nirajan Regmi, Sushil Pant
Bhandari, Sanjeeb Sudarshan, Pranawa Koirala, Nirajan Regmi, and Sushil Pant. Retinal hemorrhage in a high-altitude aid post volunteer doctor: a case report. High Alt Med Biol 00:000-000, 2017.-High-altitude retinal hemorrhages (HARHs) are seen at altitudes more than 3000 m, are usually multiple, flame shaped, and adjacent to blood vessels. Development near the macula causes blurring of vision, otherwise, they are symptomless and self-limiting. They often develop during the first few days after ascent to high altitude and subjects often suffer from acute mountain sickness (AMS) or high-altitude cerebral edema (HACE)...
May 8, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28472592/enhanced-neuronal-synchrony-during-skilled-reaching-at-high-altitude
#6
Matt Gaidica, Jenna Clem
No abstract text is available yet for this article.
May 4, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28459597/association-of-urinary-activity-of-mmp-2-with-microalbuminuria-in-an-isolated-sample-of-subjects-living-in-high-altitude-rural-locations-in-m%C3%A3-xico
#7
Magda Elena Hernández-Hernández, Jaime Morales-Romero, Clara Luz Sampieri, Diego Jesús Luna Lozano, Isidra Del Carmen Valencia Lezama, Mónica Janett Muñoz Contreras, Arturo Rodríguez Hernández
Hernández-Hernández, Magda Elena, Jaime Morales-Romero, Clara Luz Sampieri, Diego Jesús Luna Lozano, Isidra del Carmen Valencia Lezama, Mónica Janett Muñoz Contreras, and Arturo Rodríguez Hernández. Association of urinary activity of MMP-2 with microalbuminuria in an isolated sample of subjects living in high altitude rural locations in México. High Alt Med Biol. 00:000-000, 2017.-Matrix metalloproteinases (MMP) are implicated in remodeling of the renal extracellular matrix. In a cross-sectional study we evaluated renal impairment in general population of high-altitude rural locations in México...
May 1, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28453332/long-term-intermittent-exposure-to-high-altitude-elevates-asymmetric-dimethylarginine-in-first-exposed-young-adults
#8
Nicole Lüneburg, Patricia Siques, Julio Brito, Juan José De La Cruz, Fabiola León-Velarde, Juliane Hannemann, Cristian Ibanez, Rainer H Böger
Lüneburg, Nicole, Patricia Siques, Julio Brito, Juan José De La Cruz, Fabiola León-Velarde, Juliane Hannemann, Cristian Ibanez, and Rainer Böger. Long-term intermittent exposure to high altitude elevates asymmetric dimethylarginine in first exposed young adults. High Alt Med Biol 00:000-000, 2017.-Hypoxia-induced dysregulation of pulmonary and cerebral circulation may be related to an impaired nitric oxide (NO) pathway. We investigated the effect of chronic intermittent hypobaric hypoxia (CIH) on metabolites of the NO pathway...
April 28, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28453305/a-clinician-guide-to-altitude-training-for-optimal-endurance-exercise-performance-at-sea-level
#9
Keren Constantini, Daniel P Wilhite, Robert F Chapman
Constantini, Keren, Daniel P. Wilhite, and Robert F. Chapman. A clinician guide to altitude training for optimal endurance exercise performance at sea level. High Alt Med Biol 00:000-000, 2017.-For well over 50 years, endurance athletes have been utilizing altitude training in an effort to enhance performance in sea level competition. This brief review will offer the clinician a series of evidence-based best-practice guidelines on prealtitude and altitude training considerations, which can ultimately maximize performance improvement outcomes...
April 28, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28418725/medex-2015-heart-rate-variability-predicts-development-of-acute-mountain-sickness
#10
Angus Sutherland, Joseph Freer, Laura Evans, Alberto Dolci, Matteo Crotti, Jamie Hugo Macdonald
Sutherland, Angus, Joseph Freer, Laura Evans, Alberto Dolci, Matteo Crotti, and Jamie Hugo Macdonald. MEDEX 2015: Heart rate variability predicts development of acute mountain sickness. High Alt Med Biol 00:000-000, 2017. AIMS: Acute mountain sickness (AMS) develops when the body fails to acclimatize to atmospheric changes at altitude. Preascent prediction of susceptibility to AMS would be a useful tool to prevent subsequent harm. Changes to peripheral oxygen saturation (SpO2) on hypoxic exposure have previously been shown to be of poor predictive value...
April 18, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28418708/long-trekking-experience-at-high-altitude-causes-testicular-volumetric-reduction-in-humans-evidence-based-on-magnetic-resonance-imaging
#11
Vittore Verratti, Armando Tartaro, Stefano Falone, Maurizio Pellegrini, Fiore Pelliccione, Camillo Di Giulio
No abstract text is available yet for this article.
April 18, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28394182/medex2015-greater-sea-level-fitness-is-associated-with-lower-sense-of-effort-during-himalayan-trekking-without-worse-acute-mountain-sickness
#12
Gabriella M K Rossetti, Jamie H Macdonald, Matthew Smith, Anna R Jackson, Nigel Callender, Hannah K Newcombe, Heather M Storey, Sebastian Willis, Jojanneke van den Beukel, Jonathan Woodward, James Pollard, Benjamin Wood, Victoria Newton, Jana Virian, Owen Haswell, Samuel J Oliver
Rossetti, Gabriella M.K., Jamie H. Macdonald, Matthew Smith, Anna R. Jackson, Nigel Callender, Hannah K. Newcombe, Heather M. Storey, Sebastian Willis, Jojanneke van den Beukel, Jonathan Woodward, James Pollard, Benjamin Wood, Victoria Newton, Jana Virian, Owen Haswell, and Samuel J. Oliver. MEDEX2015: Greater sea-level fitness is associated with lower sense of effort during Himalayan trekking without worse acute mountain sickness. High Alt Med Biol 00:000-000, 2017.-This study examined the complex relationships of fitness and hypoxic sensitivity with submaximal exercise responses and acute mountain sickness (AMS) at altitude...
April 10, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28375664/effects-of-short-term-acclimatization-at-the-summit-of-mt-fuji-3776%C3%A2-m-on-sleep-efficacy-cardiovascular-responses-and-ventilatory-responses
#13
Masahiro Horiuchi, Shiro Oda, Tadashi Uno, Junko Endo, Yoko Handa, Yoshiyuki Fukuoka
Horiuchi, Masahiro, Shiro Oda, Tadashi Uno, Junko Endo, Yoko Handa, and Yoshiyuki Fukuoka. Effects of short-term acclimatization at the summit of Mt. Fuji (3776 m) on sleep efficacy, cardiovascular responses, and ventilatory responses. High Alt Med Biol 00:000-000, 2017.-We investigated the effects of a short period of acclimatization, at 3776 m on Mt. Fuji, on sleep parameters and related physiological responses. Physiological responses were assessed in seven healthy lowlander men during both daytime and sleep while at sea level (SL), as well as for three consecutive nights at high altitude (HA; 3776 m, day 1 [D1], D2, D3, and morning only of D4)...
April 4, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28375663/respiratory-health-benefits-and-risks-of-living-at-moderate-altitude
#14
Colin K Grissom, Barbara E Jones
Grissom, Colin K., Barbara E. Jones. Respiratory health benefits and risks of living at moderate altitude. High Alt Med Biol 00:000-000, 2017.-The respiratory system plays a critical role in the series of physiologic responses that occur at high altitude and allows individuals to adapt to and tolerate hypobaric hypoxia. Persons with underlying lung disease may have complications, but sometimes derive benefits, related to residence at high altitude. This review will focus on health benefits and risks of patients with underlying asthma, chronic obstructive pulmonary disease, pulmonary hypertension, or obstructive sleep apnea, who live at altitudes of 1500 to 4500 m...
April 4, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28346847/does-acute-normobaric-hypoxia-induce-anapyrexia-in-adult-humans
#15
Yongsuk Seo, Hayden D Gerhart, Jeremiah Vaughan, Jung-Hyun Kim, Ellen L Glickman
Seo, Yongsuk, Hayden D. Gerhart, Jeremiah Vaughan, Jung-Hyun Kim, and Ellen L. Glickman. Does acute normobaric hypoxia induce anapyrexia in adult humans? High Alt Med Biol 00:000-000, 2017.-Exposure to hypoxia is known to induce a reduction in core body temperature as a protective mechanism, which has been shown in both animals and humans. The purpose of this study was to test if acute exposure to normobaric hypoxia (NH) induces anapyrexia in adult humans in association with decreased peripheral oxygen saturation (SpO2)...
March 27, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28333563/effect-of-high-altitude-exposure-on-intraocular-pressure-using-goldmann-applanation-tonometry
#16
Gabriel Willmann, Kai Schommer, Maximilian Schultheiss, M Dominik Fischer, Karl-Ulrich Bartz-Schmidt, Florian Gekeler, Andreas Schatz
Willmann, Gabriel, Kai Schommer, Maximilian Schultheiss, M. Dominik Fischer, Karl-Ulrich Bartz-Schmidt, Florian Gekeler, and Andreas Schatz. Effect of high altitude exposure on intraocular pressure using Goldmann applanation tonometry. High Alt Med Biol. 00:000-000, 2017. AIMS: The aim of the study was to quantify changes of intraocular pressure (IOP) during exposure to 4559 m using the state-of-the-art method of Goldmann applanation tonometry for IOP measurement and to detect correlations between IOP and acute mountain sickness (AMS) in a prospective manner...
March 23, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28326844/oxidative-stress-in-acute-hypobaric-hypoxia
#17
Sebastián Irarrázaval, Claudio Allard, Juan Campodónico, Druso Pérez, Pablo Strobel, Luis Vásquez, Inés Urquiaga, Guadalupe Echeverría, Federico Leighton
Irarrázaval, Sebastián, Claudio Allard, Juan Campodónico, Druso Pérez, Pablo Strobel, Luis Vásquez, Inés Urquiaga, Guadalupe Echeverría, and Federico Leighton. Oxidative stress in acute hypobaric hypoxia. High Alt Med Biol. 00:000-000, 2017.-The effects of acute hypobaric hypoxia endured by mountaineers were studied, specifically as evidenced by acute mountain sickness (AMS) and oxidative stress damage. Ten male volunteers were exposed to acute hypobaric hypoxia, and AMS was evaluated through arterial oxygen saturation (SaO2), cardiac rate, and the Lake Louise Score (LLS)...
March 22, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28323448/effects-of-chronic-ghrelin-treatment-on-hypoxia-induced-brain-oxidative-stress-and-inflammation-in-a-rat-normobaric-chronic-hypoxia-model
#18
Hasan Omrani, Mohammad Reza Alipour, Fereshteh Farajdokht, Hadi Ebrahimi, Mehran Mesgari Abbasi, Gisou Mohaddes
AIM: This study aimed to evaluate the probable antioxidant effects of ghrelin in the brain and serum and its effect on tumor necrosis factor-alpha (TNF-α) levels in the brain in a model of chronic systemic hypoxia in rats. METHODS: Systemic hypoxia was induced by a normobaric hypoxic chamber (O2 11%) for ten days. Adult male Wistar rats were divided into control (C), chronic ghrelin (80 μg/kg/10 days) (Ghr), chronic hypoxia (CH), and CH and ghrelin (80 μg/kg/ip/10 days) (CH + Gh) groups...
March 21, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28294639/physiological-changes-to-the-cardiovascular-system-at-high-altitude-and-its-effects-on-cardiovascular-disease
#19
Callum James Riley, Matthew Gavin
Riley, Callum James, and Matthew Gavin. Physiological changes to the cardiovascular system at high altitude and its effects on cardiovascular disease. High Alt Med Biol. 00:000-000, 2017.-The physiological changes to the cardiovascular system in response to the high altitude environment are well understood. More recently, we have begun to understand how these changes may affect and cause detriment to cardiovascular disease. In addition to this, the increasing availability of altitude simulation has dramatically improved our understanding of the physiology of high altitude...
March 15, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28256920/are-permanent-residents-of-high-altitude-fully-adapted-to-their-hypoxic-environment
#20
John B West
West, John B. Are permanent residents of high altitude fully adapted to their hypoxic environment? High Alt Med Biol 00:000-000, 2017. Millions of people live permanently at high altitude and many have been there for generations. It is sometimes claimed that these people have completely adapted to their environment, and certainly some remarkable genetic adaptations have recently been described. However there is now strong evidence that permanent residents are not completely adapted to the high altitude in the sense that they have fully compensated for the environmental hypoxia...
March 3, 2017: High Altitude Medicine & Biology
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