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Topic: Orthostatic hypotension

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	Orthostatic Hypotension
		Orthostatic hypotension is a sign of autonomic dysfunction and dysautonomia in adults and in children.
		However, the experience of transient hypotension often associated with the symptom of lightheadedness with standing is common among teenagers and is familiar to pediatricians.
		Transient orthostatic hypotension in children and teenagers is a normal phenomenon related to the relative rapidity of blood translocating from the thorax to the dependent parts of the body during orthostasis.
	www.nymc.edu /fhp/centers/syncope/orthostatic_hypotension.htm (350 words)

	Orthostatic Hypotension
		Although measurements for orthostatic hypotension are not part of the standard physical examination, they should be taken if a patient's history suggests symptoms of cerebral hypoperfusion or a disease associated with orthostatic hypotension.
		Orthostatic hypotension may have more than one cause; a patient with mild neurogenic orthostatic hypotension who becomes dehydrated or starts taking a new medication could develop symptomatic orthostatic hypotension.
		Orthostatic hypotension is a systolic blood pressure decrease of at least 20 mm Hg or a diastolic blood pressure decrease of at least W mm Hg within three minutes of standing.
	mpelembe.mappibiz.com /archives_02/Orthostatic_Hypotension.html (1906 words)

	Orthostatic hypotension in ...
		Postural hypotension was significantly associated with postural dizziness, but it cannot be determined clinically just from the presence of postural dizziness because the sensitivity for diagnosis of postural hypotension is low.
		Postural hypotension may indeed be worsened after insulin injection (because of the insulin-mediated muscular vasodilatation) [3] and/or in the postprandial phase (because of the digestion-related vasodilatation of the splanchnic bed) [4].
		However, the observation that postural hypotension was detected in 15.4% of non-diabetic subjects (compared with 28.4% of diabetic patients) may suggest that a rather high proportion (up to 50%) of diabetic patients meeting the defined criteria of postural hypotension in the experimental protocol used by the authors may not indeed have diabetic autonomic neuropathy.
	www.medforum.nl /idm/orthostatic_hypotension_in____.htm (1144 words)

	Orthostatic hypotension - WrongDiagnosis.com
		Orthostatic hypotension is a sudden fall in blood pressure that occurs when a person assumes a standing position.
		Orthostatic hypotension is listed as a "rare disease" by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH).
		Orthostatic hypotension (also known as postural hypotension and, colloquially, as head rush) is a sudden fall in blood pressure, typically greater than 20/10 mm Hg, that occurs when a person assumes a standing position.
	www.wrongdiagnosis.com /o/orthostatic_hypotension/intro.htm (821 words)

	Orthostatic Hypotension
		Orthostatic hypotension is sudden low blood pressure that occurs when a person assumes a standing position.
		When orthostatic hypotension is caused by hypovolemia due to medications, the disorder may be reversed by adjusting the dosage or by discontinuing the medication.
		The prognosis for individuals with orthostatic hypotension depends on the underlying cause of the condition.
	healthlink.mcw.edu /article/921445822.html (215 words)

	Evaluation and Treatment of Orthostatic Hypotension
		The diagnosis of orthostatic hypotension requires the occurrence of a sustained postural decrease in blood pressure that may be accompanied by symptoms of cerebral hypoperfusion.
		Orthostatic hypotension due to autonomic failure occurs in patients with a history of chronic alcohol abuse, but only in association with signs of severe peripheral neuropathy (i.e., absent ankle reflexes and diminished sensation in the calves or thighs and hands).
		In contrast, orthostatic hypotension due to neurogenic causes is usually not amenable to correction of the underlying cause.
	www.neurosy.org /disease/otherdiseases/hypotension.shtml (2897 words)

	ORTHOSTATIC HYPOTENSION
		Thus, orthostatic hypotension consists of symptoms of dizziness, faintness or lightheadedness which appear only on standing, and which are caused by low blood pressure.
		Orthostatic hypotension is nearly universal in MSA, present in about 50% of patients with dementia with Lewy bodies, and about 5% of patients with Parkinson's.
		Tilt table tests are not needed in orthostatic hypotension, but may be indicated in persons with fainting (syncope).
	www.dizziness-and-balance.com /disorders/medical/orthostatic.html (2197 words)

	Back to Basics: Orthostatic Hypotension
		Orthostatic hypotension is one of the mechanisms found in CFIDS/ME. It was first discovered in 1995 by P.C. Rowe and J. Bou-Holalgah (Lancet, 345, JAMA, 274) using a tilt table testing method.
		Delayed orthostatic hypotension that is sometimes combined with orthostatic tachycardia is caused by venous pooling.
		The treatment of diabetes insipidus as well as orthostatic hypotension is eliminating the cause of the problem which is now being researched with funding from the National CFIDS Foundation.
	www.ncf-net.org /forum/BTB-OrthoHypo-Win06.htm (654 words)

	CFIDS
		Stewart J.M., Weldon A. Vascular perturbations in the chronic orthostatic intolerance of the postural orthostatic tachycardia syndrome.
		The roles of orthostatic hypotension, orthostatic tachycardia, and subnormal erythrocyte volume in the pathogenesis of the chronic fatigue syndrome.
		Postural orthostatic tachycardia and chronic fatigue: a distinct subset of neurally-mediated syncope in adolescents (abstract).
	www.cfids.org /about-cfids/orthostatic-intolerance.asp (1563 words)

	UCLA Department of Medicine - wfsection-Orthostatic Hypotension
		Orthostatic hypotension is not a specific disease but rather a manifestation of abnormal blood pressure regulation due to a variety of causes.
		Clinically, orthostatic hypotension is characterized by a consistent fall in systolic blood pressure of 20 mmHg or more and a concurrent drop in diastolic blood pressure of 10 mmHg when standing from a supine position or during a head up tilt.
		Orthostatic hypotension is more common in the elderly and seems to be a function of age.
	www.med.ucla.edu /modules/wfsection/article.php?articleid=113 (1774 words)

	Orthostatic Intolerance
		Orthostatic intolerance can then be defined as "the development of symptoms during upright standing relieved by recumbency".
		Evidence suggests that the changes in heart rate, blood pressure, and cerebral blood flow that produce orthostatic intolerance may be related to abnormalities in the interplay between blood volume control, the cardiovascular system, the autonomic nervous system and local circulatory mechanisms that regulate these basic physiological functions.
		Thus symptoms of neurovascular regulatory failure are often first appreciated during orthostatic challenge analogous to the use of exercise as a challenge to aerobic conditioning and during heart failure.
	www.nymc.edu /fhp/centers/syncope/orthostatic_intolerance.htm (817 words)

	Orthostatic Hypotension \| AHealthyMe.com
		Orthostatic hypotension is an abnormal decrease in blood pressure when a person stands up.
		When the cause of orthostatic hypotension is related to medication, it is often possible to treat it by reducing dosage or changing the prescription.
		When orthostatic hypotension cannot be treated, the symptoms can be significantly reduced by remembering to stand up slowly or by wearing elastic stockings.
	www.ahealthyme.com /topic/topic100587236 (498 words)

	Hypotension Information on Healthline
		Hypotension is the medical term for low blood pressure.
		The term "hypotension" is usually used only when blood pressure has fallen so far that enough blood can no longer reach the brain, causing dizziness and fainting.
		For those with postural hypotension, the blood pressure adjustment is not adequate or it doesn't happen.
	www.healthline.com /galecontent/hypotension (647 words)

	Orthostatic Hypotension: Low Blood Pressure: Merck Manual Home Edition
		Orthostatic hypotension is an excessive decrease in blood pressure that occurs when a person stands up, resulting in reduced blood flow to the brain and dizziness or fainting.
		Orthostatic hypotension is not a specific disease but an inability to compensate quickly for changes in blood pressure.
		Orthostatic hypotension is caused by conditions that interfere with the compensatory mechanisms that control blood pressure.
	www.merck.com /mmhe/sec03/ch023/ch023c.html (880 words)

	Should Primary Care Patients Be Screened for Orthostatic Hypotension? Journal of Family Practice - Find Articles (Site not responding. Last check: 2007-10-18)
		Hypotension may also cause underperfusion of organs, resulting in ischemic injuries, such as strokes,[5,6] particularly if there is compromised vascular supply or failure of autoregulation.
		The short-term significance of orthostatic hypotension for a particular patient is usually evident, but long-term adverse outcomes for affected patients are more difficult to predict.
		Although advanced age and hypertension, with their associated morbidities and medications, are known risk factors for orthostatic hypotension, these patients make up large subpopulations in primary care practices, and testing them will be considered screening for the purposes of this review.
	www.findarticles.com /p/articles/mi_m0689/is_7_48/ai_59407855 (570 words)

	Low Blood Pressure - Page 2
		Hypotension is the medical term for low blood pressure (under 90/60).
		Orthostatic hypotension is characterized by the body's inability to quickly regulate blood pressure after changes in position, so people may feel temporarily light-headed after standing up.
		Also known as neurogenic orthostatic hypotension, neurally mediated hypotension (NMH) is a condition in which the body does not regulate blood pressure well, especially when the person is upright.
	heart.healthcentersonline.com /bloodpressure/hypotension2.cfm (616 words)

	From the Cleveland Clinic: Other Medical Concerns: Lightheadedness
		Orthostatic hypotension can be severe in people with certain forms of the disease.
		Orthostatic hypotension can be caused by the disease itself or by the medications used to treat Parkinson's disease.
		The first approach in treating orthostatic hypotension is to decrease the pooling of blood in the legs with the use of special stockings called compression stockings.
	www.webmd.com /content/article/46/1833_50749?z=1833_50733_6511_00_24 (534 words)

	Orthostatic hypotension in aging humans -- Shi et al. 279 (4): 1548 -- AJP - Heart and Circulatory Physiology
		orthostatic hypotension observed in the elderly population is
		Orthostatic hypotension is observed in the older subjects at the onset of LBNP only.
		A significant systemic hypotension is observed in the younger subjects after vagal blockade with the use of either atropine or glycopyrrolate, associated with a substantially blunted tachycardiac response at the onset of LBNP.
	ajpheart.physiology.org /cgi/content/full/279/4/H1548 (3928 words)

	Orthostatic hypotension - Wikipedia, the free encyclopedia
		It may be caused by hypovolemia (a decreased amount of blood in the body), resulting from the excessive use of diuretics, vasodilators, or other types of drugs, dehydration, or prolonged bed rest.
		The disorder may be associated with Addison's disease, atherosclerosis (build-up of fatty deposits in the arteries), diabetes, and certain neurological disorders including Shy-Drager syndrome and other forms of dysautonomia.
		Some drugs that are used in the treatment of orthostatic hypotension include fludrocortisone (Florinef), erythropoietin and midodrine.
	en.wikipedia.org /wiki/Orthostatic_hypotension (408 words)

	New orthostatic hypotension treatment reduces symptoms without causing high blood pressure
		A drug traditionally used to treat myasthenia gravis shows potential benefit for reducing symptoms of orthostatic hypotension without raising blood pressure when people lie down, according to results of a double-blind, controlled clinical trial.
		Orthostatic hypotension (OH) - a sudden fall in blood pressure when a person stands up - is a common problem in elderly adults as well as in people with Parkinson’s disease, multiple system atrophy, diabetes, and a variety of other disorders.
		In addition, Dr. Low’s group is planning to test the drug for treatment of postural orthostatic Tachycardia syndrome (POTS), which causes an abnormal increase in heart rate when the patient stands and may also include lightheadedness, dizziness, and other symptoms like those of OH.
	www.health.am /hypertension/more/new_orthostatic_hypotension_treatment (1073 words)

	Hypotension, Orthostatic
		It is possible that the main title of the report Hypotension, Orthostatic is not the name you expected.
		Orthostatic Hypotension (OH) describes an extreme drop in blood pressure that may occur when a person stands up suddenly and the blood pools in the blood vessels of the legs.
		Pure autonomic failure (PAF) is sometimes defined as the presence of orthostatic hypotension (without an identifiable cause such as medically prescribed drugs) without evidence of any other neurological problem(s).
	www.webmd.com /hw/hypotension/nord769.asp (699 words)

	Orthostatic Hypotension
		Orthostatic hypotension is the condition where standing up is accompanied by a large drop in blood pressure, decreasing the amount of blood the heart is able to deliver to the brain, possibly resulting in dizziness or fainting.
		In a normal person, this effect is compensated for by a reflex mechanism in the autonomic nervous system that increases the heart rate and further compensates for the blood pressure, to restore it to it's normal levels.
		The mechanism behind orthostatic hypotension is: a) weakening of the veins b) gravity preventing blood from reaching the brain c) gravity impeding blood flow while atrial pressure pushes blood d) the left ventricle pumping more than the right ventricle
	bme.usc.edu /bme403/Section_3/orthostatic_hypotension.html (268 words)

	Orthostatic hypotension definition - Medical Dictionary definitions of popular medical terms
		Orthostatic hypotension: A temporary lowering of blood pressure (hypotension) due usually to suddenly standing up (orthostatic).
		Orthostatic hypotension may be experienced by healthy people -- it is more common in older people -- who rise quickly from a chair, especially after a meal, and have a few seconds of disorientation.
		If someone with orthostatic hypotension faints, they will regain consciousness by simply sitting or lying down.
	www.medterms.com /script/main/art.asp?articlekey=4672 (345 words)

	eMedicine - Idiopathic Orthostatic Hypotension and other Autonomic Failure Syndromes : Article by Bjorn Oskarsson, MD (Site not responding. Last check: 2007-10-18)
		In previous literature, the terms PAF and idiopathic orthostatic hypotension were sometimes used interchangeably.
		Orthostatic hypotension is the most common complaint in this group of patients.
		Orthostatic hypotension is defined as a decrease of at least 20 mm Hg in systolic blood pressure or at least 10 mm Hg in diastolic blood pressure within 3 minutes of standing.
	www.emedicine.com /neuro/topic609.htm (5189 words)

	Orthostatic Hypotension -- eCureMe.com
		Orthostatic hypotension is not considered a disease but a failure -- with many causes -- to regulate blood pressure rapidly.
		It is defined as a too rapid drop in blood pressure precipitated when one stands suddenly, reducing blood flow to the brain, and resulting in fainting.
		It is necessary to allow time for equilibration, and not measure the blood pressure instantly as soon as the person stands up.
	www.ecureme.com /emyhealth/Pediatrics/Orthostatic_Hypotension.asp (228 words)

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