Results 1 to 10 of about 15,908 (215)

Cerebral Blood Flow in Orthostatic Intolerance [PDF]

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease
Cerebral blood flow (CBF) is vital for delivering oxygen and nutrients to the brain. Many forms of orthostatic intolerance (OI) involve impaired regulation of CBF in the upright posture, which results in disabling symptoms that decrease quality of life ...
Muhammad Shahzeb Khan, Amanda J. Miller, Arooba Ejaz, Jeroen Molinger, Parag Goyal, David B. MacLeod, Ashley Swavely, Elyse Wilson, Meghan Pergola, Harikrishna Tandri, Camille Frazier Mills, Satish R Raj, Marat Fudim   +12 more
doaj   +6 more sources

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   +4 more sources

Correlation between orthostatic intolerance in children and levels of ACE2-Ang(1-7)-Mas axis and vitamin D [PDF]

Frontiers in Pediatrics
ObjectiveTo explore the correlation between orthostatic intolerance in children and levels of the ACE2-Ang(1-7)-Mas axis and vitamin D.MethodsBlood samples were collected from 84 children with orthostatic intolerance and 307 healthy controls.
Yao Xiao, Jinzhi Wu, Jin Wang, Tingting He, Xiangyu Dong   +4 more
doaj   +2 more sources

Case report: Recurrent cervical spinal stenosis masquerading as myalgic encephalomyelitis/chronic fatigue syndrome with orthostatic intolerance [PDF]

Frontiers in Neurology, 2023
IntroductionMyalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a complex, chronic, multi-system disorder that is characterized by a substantial impairment in the activities that were well tolerated before the illness. In an earlier report, we
Charles C. Edwards, Charles C. Edwards, Scott Heinlein, Peter C. Rowe   +3 more
doaj   +2 more sources

Orthostatic intolerance during early mobilization following thoracoscopic lung resection: a prospective observational study [PDF]

BMC Surgery
Background Early postoperative mobilization is important for enhanced recovery but can be hindered by orthostatic intolerance. However, study on postoperative orthostatic intolerance in thoracoscopic lung resection is limited.
Hongjie Yi, Wenfeng Tang, Ying Shen, Li Tan, Fanshu Zeng, Siqi Yang   +5 more
doaj   +2 more sources

Head-Up Tilt Sleeping to Treat Orthostatic Intolerance in a Patient with Advanced Parkinson’s Disease: A Case Report [PDF]

Case Reports in Neurology
Introduction: Orthostatic hypotension is common in people with Parkinson’s disease (PD) due to autonomic dysfunction and medication use and can have a significant negative impact on quality of life.
Amber H. van der Stam, Sharon Shmuely, Nienke M. de Vries, Roland D. Thijs, Mirjam van Kesteren-Biegstraaten, Bastiaan R. Bloem   +5 more
doaj   +2 more sources

Cutaneous manifestations of orthostatic intolerance syndromes

International Journal of Women's Dermatology, 2021
Dysautonomia refers to a group of autonomic nervous system disorders that affect nearly 70 million people worldwide. One subset of dysautonomia includes syndromes of orthostatic intolerance (OI), which primarily affect adolescents and women of ...
Caroline T. Starling, BSA, Quoc-Bao D. Nguyen, MD, Ian J. Butler, MB.BS, Mohammed T. Numan, MD, Adelaide A. Hebert, MD   +4 more
doaj   +3 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

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