Results 1 to 10 of about 125,897 (279)

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

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   +4 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   +3 more sources

Orthostatic intolerance as a potential contributor to prolonged fatigue and inconsistent performance in elite swimmers [PDF]

BMC Sports Science, Medicine and Rehabilitation, 2022
Background Athletic underperformance is characterized by fatigue and an inability to sustain a consistent exercise workload. We describe five elite swimmers with prolonged fatigue and athletic underperformance.
Lindsay S. Petracek, Ella F. Eastin, Ian R. Rowe, Peter C. Rowe   +3 more
doaj   +3 more sources

Plasma metabolomic profile in orthostatic intolerance children with high levels of plasma homocysteine [PDF]

Italian Journal of Pediatrics
Background Orthostatic intolerance, which includes vasovagal syncope and postural orthostatic tachycardia syndrome, is common in children and adolescents.
Yaqi Li, Baoling Bai, Hui Wang, Haojie Wu, Yanjun Deng, Chen Shen, Qin Zhang, Lin Shi   +7 more
doaj   +3 more sources

Postoperative orthostatic intolerance following fast-track unicompartmental knee arthroplasty: incidence and hemodynamics—a prospective observational cohort study [PDF]

Journal of Orthopaedic Surgery and Research
Background Early postoperative mobilization is essential for early functional recovery but can be inhibited by postoperative orthostatic intolerance (OI). Postoperative OI is common after major surgery, such as total knee arthroplasty (TKA).
Ana-Marija Hristovska, Louise B. Andersen, Bodil Uldall-Hansen, Henrik Kehlet, Anders Troelsen, Kirill Gromov, Nicolai B. Foss   +6 more
doaj   +3 more sources

Validation of the Chinese orthostatic discriminant and Severity Scale (ODSS) for detection of orthostatic intolerance syndrome [PDF]

Heliyon
Background: Orthostatic intolerance (OI) is the inability to tolerate orthostatic stress during any postural change. The etiology of OI varies, and methods to obtain a specific diagnosis and plan appropriate treatment are important.
Weiting Tang, Hui Gu, Bin Chen, Sheng Hu, Wenjie Fan, Yong You   +5 more
doaj   +4 more sources

Computational modeling of orthostatic intolerance for travel to Mars. [PDF]

NPJ Microgravity, 2022
Astronauts in a microgravity environment will experience significant changes in their cardiopulmonary system. Up until now, there has always been the reassurance that they have real-time contact with experts on Earth.
van Loon LM, Steins A, Schulte KM, Gruen R, Tucker EM.   +4 more
europepmc   +4 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   +4 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   +4 more sources