Results 81 to 90 of about 6,346 (209)

Blood Pressure Load: An Effective Indicator of Systemic Circulation Status in Individuals With Acute Altitude Sickness. [PDF]

Front Cardiovasc Med, 2021
Chen R, Ye X, Sun M, Yang J, Zhang J, Gao X, Liu C, Ke J, He C, Yuan F, Lv H, Yang Y, Cheng R, Tan H, Huang L.   +14 more
europepmc   +1 more source

Unraveling the pathogenesis and prevention strategies of acute high-altitude illness through gut microecology

npj Biofilms and Microbiomes
High-altitude environments, characterized by hypobaric and hypoxic conditions, induce acute hypoxia, resulting in decreased blood oxygen saturation.
Ping Qi, Xiansen Jiang, Xiaojuan Wang, Liang Sheng, Jiawen Liang, Lei Zhang   +5 more
doaj   +1 more source

Ascent rate and the Lake Louise scoring system: An analysis of one year of emergency ward entries for high-altitude sickness at the Mustang district hospital, Nepal. [PDF]

PLoS One, 2022
Poudel KM, Poudel TR, Shah N, Bhandari S, Sharma R, Timilsina A, Prakash M.   +6 more
europepmc   +1 more source

Effect of hypoxia on muscle activation at equivalent absolute and relative intensity during incremental and constant load exercise to task failure

Experimental Physiology, EarlyView.
Abstract We examined the impact of moderate hypoxia (HYPO) on muscle activation during incremental exercise matched for both absolute and equivalent relative intensity. Fifteen active subjects (10 males, 5 females) completed two ramp incremental test and two step tests in normoxia (NORM; FiO2${F_{{\mathrm{i}}{{\mathrm{O}}_2}}}$ = 0.209) and HYPO (FiO2${
Dania Ibrahim, Youmna Elsayed Hassanein, Nathan E. Townsend   +2 more
wiley   +1 more source

Brain strain: Blood flow and metabolism in environmental extremes

Experimental Physiology, EarlyView.
Abstract This narrative review compares and contrasts the most commonly encountered environmental stressors on human cerebrovascular functioning. From high altitude and space, extreme apnoea, heat and cold stress, the impact of these stressors on the regulation of cerebral blood flow (CBF) and oxygen metabolism (CMRO2${\mathrm{CM}}{{\mathrm{R}}_ ...
Dario Vrdoljak, Damian M. Bailey, Travis D. Gibbons, Philip N. Ainslie   +3 more
wiley   +1 more source

Cardiorespiratory effects of high altitude exposure

Cardiologia Hungarica
At high altitude, the partial pressure of oxygen in the air is lower than at sea level. During acclimatization, the body adapts to this condition through respiratory, circulatory, renal, and hematological processes.
Szilvia Kugler, Eszter Dalma Pálinkás, Béla Merkely, Balázs Sax   +3 more
doaj   +1 more source

Cellular microenvironment of erythropoietin‐producing cells in hypoxic and injured mouse kidneys

Experimental Physiology, EarlyView.
Abstract The main sources of circulating erythropoietin (Epo) in the adult are kidney Norn cells, a recently identified interstitial cell type capable of becoming renal Epo‐producing (REP) cells following a local decrease in tissue oxygenation. REP cells are restricted to small clusters in the corticomedullary border region, suggesting that their ...
Olga M. Lempke, Thomas Knöpfel, Stellor Nlandu Khodo, Roland H. Wenger   +3 more
wiley   +1 more source

Breathtaking heights: Lung mechanics and pulmonary extravascular fluid accumulation in female climbers during the K2 expedition

Experimental Physiology, EarlyView.
Abstract Female physiological responses to hypoxia remain underexplored, despite growing participation in mountaineering expeditions. Pulmonary interstitial oedema described during acute hypobaric hypoxia can be exacerbated by prolonged physical exercise. It is unclear whether these factors alter the mechanical properties of the respiratory system.
Guia Tagliapietra, Pasquale Pio Pompilio, Chiara Veneroni, Davide Bizzotto, Raffaele Dellacà, Giacomo Strapazzon, Giovanni Vinetti, Lorenza Pratali, Annalisa Cogo, The K2‐70 Operation Study Group   +9 more
wiley   +1 more source

Pulmonary arterial mechanoreceptors mediate sustained sympathoexcitation during high altitude hypoxia in humans

Experimental Physiology, EarlyView.
Abstract Sympathetic nervous system activation is a hallmark of high‐altitude hypoxia, yet the afferent mechanisms remain incompletely defined. We examined the relative contributions of pulmonary arterial mechanoreceptors and carotid chemoreceptors – two excitatory pathways co‐activated by hypoxia – to sustained sympathoexcitation at altitude.
Michiel T. Ewalts, Lydia L. Simpson, Jack S. Talbot, Elliott J. Jenkins, Travis D. Gibbons, Connor A. Howe, Lauren E. Maier, Emily R. Vanden Berg, Alex M. Williams, Philip N. Ainslie, Samuel J. Oliver, Craig D. Steinback, Mike Stembridge, Jonathan P. Moore   +13 more
wiley   +1 more source

Cooling down for going up: Could selective ‘brain chilling’ mitigate high‐altitude illness?

Experimental Physiology, EarlyView.
Adnan Haq, Damian M. Bailey
wiley   +1 more source