21. Arch Neurol Abstract Misdiagnosis Of Spontaneous Intracranial Misdiagnosis of Spontaneous Intracranial hypotension hypotension. Increasing the awareness of this spontaneous type of intracranial http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

22. Orthostatic Hypotension - Wikipedia, The Free Encyclopedia Orthostatic hypotension (also known as postural hypotension and, colloquially, When orthostatic hypotension is caused by hypovolemia due to medications, http://en.wikipedia.org/wiki/Orthostatic_hypotension

You did it! Over US$240,000 was donated in the 21 day fund drive. Thank you for your generosity! You are still welcome to make a donation or purchase Wikimedia merchandise Orthostatic hypotension From Wikipedia, the free encyclopedia. Orthostatic hypotension (also known as postural hypotension and, colloquially, as head rush ) is a sudden fall in blood pressure that occurs when a person assumes a standing position. Symptoms, which generally occur after sudden standing, include dizziness , lightheadedness, blurred vision , and syncope (temporary loss of consciousness). 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 dysautonomias. When orthostatic hypotension is caused by hypovolemia due to medications, the disorder may be reversed by adjusting the dosage or by discontinuing the medication. When the condition is caused by prolonged bed rest, improvement may occur by sitting up with increasing frequency each day. In some cases, physical counterpressure such as elastic hose or whole-body inflatable suits may be required. Dehydration is treated with salt and fluids. The prognosis for individuals with orthostatic hypotension depends on the underlying cause of the condition.

23. Dr.T C Hain A look at what causes orthostatic hypotension as well as diagnosing, tests, treatment by way of nondrugs as well as drugs. http://www.tchain.com/otoneurology/disorders/medical/orthostatic.html

24. Arch Neurol Abstract Orthostatic Hypotension In De Novo Orthostatic hypotension in De Novo Parkinson Disease Frequency of orthostatic hypotension in a community based cohort of patients with http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

25. Hypotension, Home, Low Blood Pressure, Treatments For Low Blood Pressure, Treatm Heart Infocenter. hypotension, Low Blood Pressure, Treatments for low blood pressure, Treatments for hypotension. http://www.holistic-online.com/Remedies/Heart/hypot_home.htm

Home Search Alternative Medicine Stress Management ... Media Dr. George Jacob Heart Infocenter Hypotension (Low Blood Pressure) What is Low Blood Pressure (Hypotension) Related Topics in Holisticonline.com Heart Infocenter Home Hypertension (high Blood Pressure) Stress Management Home Diseases/Remedies Home ... Alternative Therapies Home Alternative and Complementary Medicine for Hypotension Acupuncture and Acupressure Aromatherapy Autosuggestion Ayurvedic Treatment ... Holisticonline.com Home Holisticonline.com is developed and maintained by ICBS, Inc. Send mail to: info@holisticonline.com with comments about this web site. 1998-2005 ICBS, Inc.

26. THE MERCK MANUAL, Sec. 16, Ch. 200, Orthostatic Hypotension And Syncope A look at the cardiac causes, symptoms, signs, diagnoses, prognosis and treatment of orthostatic hypotension and syncope. http://www.merck.com/pubs/mmanual/section16/chapter200/200a.htm

var locationOverride = "http://www.merck.com/pubs/"; This Publication Is Searchable The Merck Manual of Diagnosis and Therapy Section 16. Cardiovascular Disorders Chapter 200. Orthostatic Hypotension And Syncope Topics Orthostatic Hypotension Syncope Orthostatic Hypotension Orthostatic hypotension is not a specific disease but rather a manifestation of abnormal BP regulation due to various causes. Etiology and Pathophysiology The gravitational stress of sudden standing normally causes pooling of blood in the venous capacitance vessels of the legs and trunk. The subsequent transient decrease in venous return and cardiac output results in reduced BP. Baroreceptors in the aortic arch and carotid bodies activate autonomic reflexes that rapidly normalize BP by causing a transient tachycardia. These changes reflect primarily the sympathetic mediated increase in catecholamine levels, which augments vasomotor tone of the capacitance vessels, increases heart rate and myocardial contractility, and thereby enhances cardiac output; arterial and venous vasoconstriction are mediated by similar mechanisms. Vagal inhibition also increases the heart rate. With continued standing, ADH secretion and activation of the renin-angiotensin-aldosterone system cause Na and water retention and expansion of the circulating blood volume. When afferent, central, or efferent portions of the

27. Dr.T C Hain A look at what causes orthostatic hypotension as well as diagnosing, tests, treatment by way of nondrugs as well as drugs. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

28. Hypotension hypotension, or low blood pressure, means that the pressure of blood as it circulates around the body is lower than normal, or lower than expected. http://www.betterhealth.vic.gov.au/bhcv2/bhcarticles.nsf/pages/Hypotension?OpenD

29. CWRU School Of Medicine This article discusses orthostatic hypotension with a brief description and details on diagnosing, tips to assist the patient, diet, salt, and medications. http://casemed.case.edu/dept/autonomic/anstopic/oh.htm

30. Orthostatic Hypotension - December 15, 2003 - American Family Orthostatic hypotension JOHN G. BRADLEY, M.D., and KATHY A. DAVIS, R.N. Southern Illinois University School of Medicine, Decatur, Illinois http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

31. Hypotension - David L. Hoffmann B.Sc. (Hons), M.N.I.M.H. - HealthWorld Online, H HealthWorld Online is the Internet s leading resource on alternative medicine, wellness, and mind/body health, featuring the Wellness Inventory whole person http://www.healthy.net/library/books/hoffman/cardiovascular/HYPOTEN.HTM

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32. Orthostatic Hypotension Orthostatic hypotension is a sign of autonomic dysfunction and dysautonomia in Transient orthostatic hypotension in children and teenagers is a normal http://www.nymc.edu/fhp/centers/syncope/orthostatic_hypotension.htm

Orthostatic Hypotension H ome NIH Studies: CFS ... Search Definition Defined by the consensus group of the American Autonomic Society as a sustained decrease in blood pressure exceeding 20 mmHg systolic or 10 mmHg diastolic occurring within 3 minutes of upright tilt. Orthostatic hypotension is a sign of autonomic dysfunction and dysautonomia in adults and in children. It may also occur with reductions of blood or plasma volume. 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. This may be sufficiently rapid that there is not sufficient time for neurovascular compensation and blood pressure falls. We hypothesized that transient hypotension is a normal phenomenon which may be mistaken for orthostatic intolerance. We measured peripheral blood flow and venous pressure in the arms and legs using venous plethysmography. Data indicate that healthy subjects with normal vasoconstrictive responses to sustained upright tilt, uniformly experience a transient fall in blood pressure during 70

33. PPP Healthcare International Gives general information about hypotension, discussing causes and what other medical conditions may be associated with this. http://www.axappphealthcare.co.uk/maia?h=fam_head&f=factsheet_footer&p=c

34. Hypotension Other factors which increase the risk of hypotension include lack of antenatal steroids, 3 Risk of hypotension reduces with increasing postnatal age. http://www.cs.nsw.gov.au/rpa/neonatal/html/newprot/hypotefn.htm

Department of Neonatal Medicine Protocol Book Royal Prince Alfred Hospital Hypotension Introduction: Blood pressure (BP) is the product of blood flow and vascular resistance. Normal BP is difficult to define in preterm babies, a group who, by definition, are not normal. Watkins et al defined the 10th centile for mean BP within the first 24 hours according to birth weight. Birth Weight 10th centile for mean BP 500-750 grams 26 mmHg 750-1000 grams 28 mmHg 1000-1250 grams 29 mmHg 1250-1500 grams 30 mmHg From this a useful "rule of thumb" can be derived that mean BP should be maintained above the gestation in weeks. Incidence and risk factors: Other factors which increase the risk of hypotension include lack of antenatal steroids, large patent ductus arteriosus , higher pressure ventilation. Risk of hypotension reduces with increasing postnatal age. Consequences: Hypotension has been associated with poor outcomes, particularly intraventricular haemorrhage and periventricular leukomalacia. Diagnosis: BP is used in neonatology as a marker of systemic perfusion. However BP correlates only weakly with cardiac output and babies can have low BP and normal cardiac output and normal BP and low cardiac output.

35. Hypotension CHC Wausau Hospital s Medical Library and Patient Education Center provides research services and healthcare information to physicians, http://www.chclibrary.org/micromed/00052380.html

Main Search Index Definition Description Causes ... Resources Hypotension Definition Hypotension is the medical term for low blood pressure. Description The pressure of the blood in the arteries rises and falls as the heart and muscles handle demands of daily living, such as exercise , sleep and stress . Some healthy people have blood pressure well below the average for their age, even though they have a completely normal heart and blood vessels. This is often true of athletes who are in superior shape. 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 Postural hypotension is the most common type of low blood pressure. In this condition, symptoms appear after a person sits up or stands quickly. In normal people, the cardiovascular system must make a quick adjustment to raise blood pressure slightly to account for the change in position. For those with postural hypotension, the blood pressure adjustment is not adequate or it doesn't happen. Postural hypotension may occur if someone is taking certain drugs or medicine for high blood pressure. It also happens to diabetics when nerve damage has disrupted the reflexes that control blood pressure. Many people have a chronic problem with low blood pressure that is not particularly serious. This may include people who require certain medications, who are pregnant, have bad veins, or have arteriosclerosis (hardening of the arteries).

36. Orthostatic Hypotension CHC Wausau Hospital s Medical Library and Patient Education Center provides research services and healthcare information to physicians, http://www.chclibrary.org/micromed/00059140.html

Main Search Index Definition Description Causes ... Resources Orthostatic hypotension Definition Orthostatic hypotension is an abnormal decrease in blood pressure when a person stands up. This may lead to fainting Description When a person stands upright, a certain amount of blood normally pools in the veins of the ankles and legs. This pooling means that there is slightly less blood for the heart to pump and causes a drop in blood pressure. Usually, the body responds to this drop so quickly, a person is unaware of the change. The brain tells the blood vessels to constrict so they have less capacity to carry blood, and at the same time tells the heart to beat faster and harder. These responses last for a very brief time. If the body's response to a change in vertical position is slow or absent, the result is orthostatic hypotension. It is not a true disease, but the inability to regulate blood pressure quickly. Orthostatic hypotension has many possible causes. The most common cause is medications used to treat other conditions. Diuretics reduce the amount of fluid in the body which reduces the volume of blood. Medicines used to expand the blood vessels increase the vessel's ability to carry blood and so lower blood pressure.

37. Hypotension Complicating Regional Blockade hypotension complicating regional blockade Leonie Watterson. hypotension is the most common complication of regional blockade. A systolic blood pressure of http://www.manbit.com/oa/c6.htm

Hypotension complicating regional blockade Leonie Watterson Hypotension is the most common complication of regional blockade. A systolic blood pressure of less than 100 mmHg, or a fall of greater than 30% should be considered significant (1). Hypotension usually results from the physiologic effects of sympathetic blockade on the cardiovascular system and will be exacerbated by aortocaval compression ( Figure 28.1 Chapter 28 ) or reverse Trendelenberg positioning. It is important to bear in mind the other possible causes of a low blood pressure in the parturient who has a functioning epidural block ( Table 6.2 The incidence of hypotension can be markedly reduced by the employment of preventative measures. A reduction from 79%-100% to 0-10% has been demonstrated as a result of the use of the left lateral position, intravenous preloading, and vasopressor therapy (2, 3). The management of hypotension should be approached in three stages: 1. Commence supportive measures to stabilise maternal blood pressure: ( Table 6.1

38. Postural (Orthostatic) Hypotension Postural hypotension, also known as orthostatic hypotension, You will have an increased tendency for postural hypotension if your level of injury is at http://calder.med.miami.edu/pointis/pos.html

OTHER COMPLICATIONS OF SPINAL CORD INJURY: POSTURAL (ORTHOSTATIC) HYPOTENSION Postural hypotension, also known as orthostatic hypotension, is a condition which results in a decrease in blood pressure when you sit or stand. This can cause "light-headedness" or "fainting". It occurs more commonly when you are first injured, when you are fatigued, or after any illness. You will have an increased tendency for postural hypotension if your level of injury is at T-6 or above, but it can occur in all spinal cord injured individuals. After your spinal cord injury, the blood vessels do not decrease in size, in response to lowered blood pressure, due to the altered function of the autonomic nervous system. Because of this, blood pools in the pelvic region or legs while you are sitting or sanding. Postural hypotension usually occurs when you are initially placed in your wheelchair or on the tilt table. To prevent this, wear elastic hose and an abdominal support. It is also helpful to come to a sitting or standing position gradually. If postural hypotension occurs while you are in a wheelchair, your attendant should firmly grab the handles of the wheelchair and tilt you backward, until your head and neck are nearly horizontal to the floor. This will increase your blood pressure and the "fainting" will quickly disappear. You should then be gradually returned to a sitting position.

39. Orthostatic Hypotension Orthostatic hypotension is sudden low blood pressure that occurs when a person assumes a standing position. http://healthlink.mcw.edu/article/921445822.html

Search Articles: search tips Please Take the HealthLink Survey Email this article Print this article Find related articles: By topic: Neurology By keywords: Receive Health Link via email! Subscribe now >> Orthostatic Hypotension Orthostatic hypotension is sudden low blood pressure that occurs when a person assumes a standing position. 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, 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 dysautonomias. Symptoms, which generally occur after sudden standing, may include dizziness, lightheadedness, blurred vision, and syncope (temporary loss of consciousness). When orthostatic hypotension is caused by hypovolemia due to medications, the disorder may be reversed by adjusting the dosage or by discontinuing the medication. When the condition is caused by prolonged bed rest, improvement may occur by sitting up with increasing frequency each day. In some cases, physical counterpressure such as elastic hose or whole-body inflatable suits may be required. The prognosis for individuals with orthostatic hypotension depends on the underlying cause of the condition.

40. What Are The Symptoms Of Hypotension? hypotension, also known as low blood pressure, is caused when blood vessels dilate reducing the blood pressure. Learn about it! http://papa.essortment.com/whathypotension_pit.htm

What are the symptoms of hypotension? Hypotension, also known as low blood pressure, is caused when blood vessels dilate reducing the blood pressure. Learn about it! Hypotension, also known as low blood pressure, is caused when blood vessels dilate reducing the blood pressure. As an immediate reaction sensors in the body send out signals to the brain and heart to increase the heart rate. This in turn increases the output of blood that is pumped to the body by the heart. Even so, the result is little or no change in the blood pressure. When a person has low blood pressure the blood is unable to supply enough oxygen and nutrients to the cells. This also makes it impossible for the blood to properly remove waste from the cells. In some cases a normal healthy person will have a normally low blood pressure while they are resting. In this case the person will tend to live longer. Blood pressure in the body is determined by three factors. The amount of blood that is pumped from the heart, the capacity of the blood vessels and volume of blood in the vessels. The greater the amount of blood that is pumped by the heart per minute, the higher a persons blood pressure will be. When the heart beats slow or the contractions of the heart are weakened the amount of blood that is pumped may be reduced. There are many factors that affect the blood pressure in the body. When more blood is circulated through the body the blood pressure will rise. It will also rise when the blood vessels have a smaller capacity. Thus any loss of blood from dehydration or excessive bleeding will reduce the bodies blood pressure, as will any dilation of the blood vessels.

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