Results 251 to 260 of about 123,113 (271)

Diagnostic management of orthostatic intolerance in the workplace

International Archives of Occupational and Environmental Health, 2003
Orthostatic intolerance (OI) is a syndrome that is characterised by headache, concentration difficulties, palpitation of the heart, dizziness associated with postural tachycardia and plasma norepinephrine concentrations that are disproportionately high when the sufferer is in the upright posture. In contrast to other forms of orthostatic dysregulation -
Alfred Barth, Dorner W, Heider A, Christian Wolf, R. Winker, Sabine Ivancsits, Hugo W. Rüdiger, Alexander Pilger, Ivo Ponocny, Mayr O   +9 more
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Acetylcholinesterase Inhibition in Patients With Orthostatic Intolerance

Journal of Clinical Neurophysiology, 2006
The efficacy of current therapeutic measures in orthostatic intolerance (OI) varies among patients and is oftentimes unsatisfactory. New approaches to alleviate symptoms of OI are therefore clearly needed. Recent reports have demonstrated that acetylcholinesterase inhibition is effective in the treatment of orthostatic hypotension with the presumed ...
Phillip A. Low, Stacy M. Hines, Wolfgang Singer, Kim K. Nickander, Tonette L. Opfer-Gehrking   +4 more
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Cortical Morphology in Patients with Orthostatic Intolerance

European Neurology, 2015
<b><i>Background:</i></b> We evaluated the cortical morphology in patients with orthostatic intolerance. <b><i>Methods:</i></b> Thirty patients with orthostatic intolerance, as well as age- and sex-matched normal controls, were enrolled in this study.
Chi-Woong Mun, Yong Hee Han, Tae-Hyung Kim, Kyong Jin Shin, Sung Eun Kim, Jin Se Park, Sam Yeol Ha, Kang Min Park   +7 more
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Compression Garments as Countermeasures to Orthostatic Intolerance

Aviation, Space, and Environmental Medicine, 2009
All astronauts experience some degree of orthostatic intolerance following spaceflight, ranging from tachycardia to orthostatic hypotension and syncope. The purpose of this study was to evaluate the ability of two compression garments, the National Aeronautics and Space Administration's inflatable antigravity suit (AGS) and the Russian Federal Space ...
Stuart M. C. Lee, Steven H. Platts, Jennifer A Tuxhorn, Janice V. Meck, L. Christine Ribeiro, Michael B. Stenger   +5 more
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Orthostatic intolerance in the chronic fatigue syndrome

Journal of the Autonomic Nervous System, 1999
This study aims to investigate the prevalence and pathophysiology of orthostatic intolerance (OI) and its potential contribution to symptoms of a group of unselected patients with chronic fatigue syndrome (CFS). Seventy five patients (65 women, 10 men) with CFS were evaluated.
Denis Phaneuf, Theodore Wein, Julie Benoit, Ronald Schondorf   +3 more
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Delayed orthostatic hypotension

Neurology, 2006
To investigate the prevalence, symptoms, and neurophysiologic features of delayed orthostatic hypotension (OH).Blood pressures (BP) were measured at 1-minute intervals on 230 patients during 60 degrees head-up tilt for 45 minutes and standing for 5 minutes.
Christopher H. Gibbons, Roy Freeman
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Orthostatic Intolerance: Orthostatic Hypotension and Postural Orthostatic Tachycardia Syndrome

2010
In health, movement from lying or sitting to standing is largely unassociated with evident change in well-being. However, in some individuals, especially those who are physically deconditioned, there may be a transient sense of increased heart rate.
Michele Brignole, David G. Benditt
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Neurological Aspects of Syncope and Orthostatic Intolerance

Medical Clinics of North America, 2009
Sudden falling with loss of consciousness from syncope and symptoms of orthostatic intolerance are common, dramatic clinical problems of diverse cause, but cerebral hypoperfusion is the ultimate mechanism in most. Cardiac, reflex, and orthostatic hypotension are important forms to consider.
Pezhman Zadeh, Louis H. Weimer
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Autonomic function testing in long-COVID syndrome patients with orthostatic intolerance

Autonomic Neuroscience, 2022
Ahmed M. Eldokla, Sara T. Ali
semanticscholar   +1 more source

Orthostatic Intolerance of Viperid Snakes

Physiological Zoology, 1993
Whereas many terrestrial vertebrates can assume upright postures for long periods, some terrestrial snakes are unable to do so because blood circulation fails. Measurements of carotid arterial blood flow during head-up tilt in four viperid species demonstrate that blood flow to the head diminishes markedly when the body deviates from horizontal posture
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