Results 11 to 20 of about 16,320 (239)

Orthostatic Intolerance in Older Persons: Etiology and Countermeasures [PDF]

Frontiers in Physiology, 2017
Orthostatic challenge produced by upright posture may lead to syncope if the cardiovascular system is unable to maintain adequate brain perfusion. This review outlines orthostatic intolerance related to the aging process, long-term bedrest confinement ...
Nandu Goswami, Andrew P. Blaber, Helmut Hinghofer-Szalkay, Jean-Pierre Montani   +3 more
doaj   +6 more sources

Orthostatic intolerance with tachycardia (postural tachycardia syndrome) and without (hypocapnic cerebral hypoperfusion) represent a spectrum of the same disorder [PDF]

Frontiers in Neurology
BackgroundSpectrum of chronic orthostatic intolerance without orthostatic hypotension includes postural tachycardia syndrome (POTS), with orthostatic tachycardia and hypocapnic cerebral hypoperfusion (HYCH), without orthostatic tachycardia.
Peter Novak, Peter Novak, David M. Systrom, David M. Systrom, Alexandra Witte, Sadie P. Marciano   +5 more
doaj   +2 more sources

Impact of Daily Lower‐Body Negative Pressure or Cycling Followed by Venous Constrictive Thigh Cuffs on Bedrest‐Induced Orthostatic Intolerance [PDF]

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease
Background Orthostatic intolerance occurs following immobilization in patients on Earth and in astronauts after spaceflight. Head‐down tilt bedrest is a terrestrial model for weightlessness and induces orthostatic intolerance.
Jan‐Niklas Hönemann, Fabian Hoffmann, Laura de Boni, Peter Gauger, Edwin Mulder, Stefan Möstl, Karsten Heusser, Marie‐Therese Schmitz, Marcel Halbach, Steven S. Laurie, Stuart M. C. Lee, Brandon R. Macias, Jens Jordan, Jens Tank   +13 more
doaj   +2 more sources

Classical and Delayed Orthostatic Hypotension in Patients With Unexplained Syncope and Severe Orthostatic Intolerance [PDF]

Frontiers in Cardiovascular Medicine, 2020
Background: Orthostatic hypotension (OH) is a major sign of cardiovascular autonomic failure leading to orthostatic intolerance and syncope. Orthostatic hypotension is traditionally divided into classical OH (cOH) and delayed OH (dOH), but the ...
Parisa Torabi, Parisa Torabi, Fabrizio Ricci, Fabrizio Ricci, Viktor Hamrefors, Viktor Hamrefors, Richard Sutton, Richard Sutton, Artur Fedorowski, Artur Fedorowski   +9 more
doaj   +2 more sources

Normative data for the 10-min lean test in adults without orthostatic intolerance [PDF]

Frontiers in Neurology
BackgroundOrthostatic intolerance syndromes such as Orthostatic Hypotension (OH) and Postural Orthostatic Tachycardia Syndrome (PoTS) are common symptoms seen in post-infection conditions and other neurological conditions with autonomic dysfunction.
Nafi Iftekhar, Nafi Iftekhar, Amy Wilson, Louis Nguty, Hussain Al-Hilali, Yusur Al-Hilali, Kinshuk Jain, Angela Braka, Thomas Osborne, Manoj Sivan   +9 more
doaj   +2 more sources

Circulating Autoantibodies Against Vasoactive Biomarkers Related to Orthostatic Intolerance in Long COVID Patients Compared to No-Long-COVID Populations: A Case-Control Study [PDF]

Biomolecules
Endothelial dysfunction mediated by elevated levels of autoantibodies against vasoactive peptides occurring after COVID-19 infection is proposed as a possible pathomechanism for orthostatic intolerance in long COVID patients.
Emilie Han, Katrin Müller-Zlabinger, Ena Hasimbegovic, Laura Poschenreithner, Nina Kastner, Babette Maleiner, Kevin Hamzaraj, Andreas Spannbauer, Martin Riesenhuber, Anja Vavrikova, Antonia Domanig, Christian Nitsche, Dominika Lukovic, Thomas A. Zelniker, Mariann Gyöngyösi   +14 more
doaj   +2 more sources

The Clinical Utility of Assessing Orthostatic Intolerance in Adolescents with Sport-Related Concussion, a Retrospective Study [PDF]

Diagnostics
Background/Objective: Assessing Orthostatic Intolerance (OI, symptoms upon standing from supine) is recommended in athletes with sport-related concussions (SRCs), as this is caused by impairments in the cardiovascular autonomic nervous system (cANS ...
Mohammad N. Haider, Jule Deren, Karim Khaled, Cathlyn Corrado, Haley M. Chizuk, Jeffrey C. Miecznikowski, John J. Leddy   +6 more
doaj   +2 more sources

Orthostatic Intolerance and Chronotropic Incompetence in Patients With Myalgic Encephalomyelitis or Chronic Fatigue Syndrome. [PDF]

Circ Rep, 2023
Miwa K.
europepmc   +3 more sources

Impaired Cerebral Autoregulation during Head Up Tilt in Patients with Severe Brain Injury. [PDF]

PLoS ONE, 2016
Early mobilization is of importance for improving long-term outcome for patients after severe acquired brain injury. A limiting factor for early mobilization by head-up tilt is orthostatic intolerance.
Christian Gunge Riberholt, Niels Damkjær Olesen, Mira Thing, Carsten Bogh Juhl, Jesper Mehlsen, Tue Hvass Petersen   +5 more
doaj   +7 more sources

Orthostatic intolerance in chronic fatigue syndrome

Journal of Translational Medicine, 2019
Background Orthostatic intolerance (OI) is a significant problem for those with chronic fatigue syndrome (CFS). We aimed to characterize orthostatic intolerance in CFS and to study the effects of exercise on OI.
Richard Garner, James N. Baraniuk
doaj   +3 more sources