Results 181 to 190 of about 84,351 (216)
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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 and the Headache Patient
Seminars in Pediatric Neurology, 2010Orthostatic intolerance (OI) refers to a group of clinical conditions, including postural orthostatic tachycardia syndrome (POTS) and neurally mediated hypotension (NMH), in which symptoms worsen with upright posture and are ameliorated by recumbence.
Kenneth J, Mack +2 more
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Pyridostigmine in the Treatment of Orthostatic Intolerance
Annals of Pharmacotherapy, 2007Objective: To review the efficacy of pyridostigmine bromide for the treatment of orthostatic intolerance. Data Sources: MEDLINE and International Pharmaceutical Abstracts were searched (1966–December 2006) using the terms ...
Barry J, Gales, Mark A, Gales
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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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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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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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Orthostatic Intolerance: A Disorder of Young Women
Obstetrical & Gynecological Survey, 2000Orthostatic intolerance (OI) is a cause of significant disability in otherwise healthy women seen by gynecologists. Orthostatic tachycardia is often the most obvious hemodynamic abnormality found in OI patients, but symptoms may include dizziness, visual changes, discomfort in the head or neck, poor concentration, fatigue, palpitations, tremulousness ...
Y S, Ali +6 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.
Kyong Jin, Shin +7 more
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Orthostatic Intolerance: Orthostatic Hypotension and Postural Orthostatic Tachycardia Syndrome
2010In 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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