Results 171 to 180 of about 15,908 (215)
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Selected biomarkers of orthostatic intolerance
Vnitřní lékařství, 2023Orthostatic intolerance (OI) is defined as a group of diseases which symptoms are typically manifested in a standing position. These symptoms result from cerebral hypoperfusion and disappear in the supine position. We include postural orthostatic intolerance syndrome (POTS), orthostatic hypotension (OH) and vasovagal orthostatic syncope in this group ...
Barbora, Bačkorová, Ivica, Lazúrová
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Orthostatic intolerance after spaceflight
Journal of Applied Physiology, 1996Orthostatic intolerance occurs commonly after spaceflight, and important aspects of the underlying mechanisms remain unclear. We studied 14 individuals supine and standing before and after three space shuttle missions of 9-14 days. After spaceflight, 9 of the 14 (64%) crew members could not complete a 10-min stand test that all completed preflight ...
J C, Buckey +7 more
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Syncope and orthostatic intolerance
Medical Clinics of North America, 2003Syncope and orthostatic intolerance remain common and significant clinical problems with many undocumented, misdiagnosed, or cryptogenic cases. Careful clinical assessment and application of advancing laboratory support can further improve diagnosis and treatment.
Louis H, Weimer, Olajide, Williams
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Orthostatic Intolerance in Behcet's Disease
Autonomic Neuroscience, 2001Neurological manifestations are known to occur in patients with Behcet's Disease (BD) and significantly affect the clinical course of the disease. Nevertheless, the prevalence, pattern and severity of autonomic impairment in such patients have yet to be defined. In this paper, we presented a BD patient with orthostatic tachycardia.
T, Tellioglu, D, Robertson
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Orthostatic Intolerance and Chiari I Malformation
Neurosurgery Clinics of North America, 2023Individuals with Chiari malformation can present with symptoms of fatigue, lightheadedness, and syncope-the cardinal features of orthostatic intolerance. Similar orthostatic symptoms can complicate the clinical course following Chiari decompression. The presence of orthostatic intolerance in patients with Chiari malformation is not surprising given the
Lindsay S, Petracek, Peter C, Rowe
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Cerebral Autoregulation in Orthostatic Intolerance
Annals of the New York Academy of Sciences, 2001Abstract: Many of the primary symptoms of orthostatic intolerance (fatigue, diminished concentration) as well as some of the premonitory symptoms of neurally mediated syncope (NMS) are thought to be due to cerebral hypoperfusion. Transcranial Doppler measurements of middle cerebral artery blood velocity (CBV) is at present the only technique for ...
R, Schondorf, J, Benoit, R, Stein
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Orthostatic intolerance in post-concussion patients
The Physician and Sportsmedicine, 2021Orthostatic intolerance (OI) following pediatric concussion is not well understood. Assessing the prevalence of concussion-related OI and how it compares to non-concussion-related OI will improve care for patients suffering with these symptoms. OBJECTIVE: We set out to describe concussion-related OI in adolescence, with particular emphasis on time to ...
Sara J, Gould +4 more
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1993
Abstract A goal of the previous chapters was to explain how neural and humoral mechanisms of vascular and cardiac control keep blood pressure from falling during orthostasis. The goal of this chapter is to amplify the discussion of essential adjustments to orthostasis by showing what happens when a particular part of the control system ...
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Abstract A goal of the previous chapters was to explain how neural and humoral mechanisms of vascular and cardiac control keep blood pressure from falling during orthostasis. The goal of this chapter is to amplify the discussion of essential adjustments to orthostasis by showing what happens when a particular part of the control system ...
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Gastrointestinal Symptoms Associated with Orthostatic Intolerance
Journal of Pediatric Gastroenterology and Nutrition, 2005ABSTRACTBackground:The term orthostatic intolerance is used to describe symptoms of hemodynamic instability such as lightheadedness, fatigue, impaired cognition and syncope that develop on assuming an upright posture. Common forms of orthostatic intolerance in childhood include postural tachycardia syndrome and neurally mediated hypotension.Objective:A
Sean D, Sullivan +5 more
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Orthostatic intolerance and orthostatic tachycardia: A heterogeneous disorder
Clinical Autonomic Research, 1995A series of autonomic function tests were performed in eight patients who had orthostatic intolerance and orthostatic tachycardia (> 36 bpm). All eight had an abnormal tilt-table test (mean tachycardia 50 bpm compared with 22 +/- 7 bpm in 31 normal subjects). Plasma volume was low in four out of six patients.
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