1. MedlinePlus Medical Encyclopedia: Blood Pressure - Low Medline Health information looks at this disorder. An overview and indepth look at the causes and treatments. http://www.nlm.nih.gov/medlineplus/ency/article/003083.htm

@import url(/medlineplus/images/advanced.css); Skip navigation Medical Encyclopedia Other encyclopedia topics: A-Ag Ah-Ap Aq-Az B-Bk ... Z Blood pressure - low Contents of this page: Illustrations Alternative names Definition Considerations ... What to expect at your health care provider's office Illustrations Effects of age on blood pressure Alternative names Return to top Hypotension; Low blood pressure Definition Return to top Low blood pressure is an abnormal condition where a person's blood pressure (the pressure of the blood against the walls of the blood vessels during and after each beat of the heart) is much lower than usual, which can cause symptoms such as dizziness or lightheadedness. Considerations Return to top When the blood pressure is too low, there is inadequate blood flow to the heart, brain, and other vital organs. A blood pressure level that is borderline low for one person may be normal for another. The most important factor is how the blood pressure changes from the normal condition. Most normal blood pressures fall in the range of 90/60 mm Hg to 130/80 mm Hg, but a significant change, even as little as 20 mm Hg, can cause problems for some people. Common Causes Return to top Low blood pressure is commonly caused by drugs such as the following Medications used for surgery Anti-anxiety agents Treatment for high blood pressure Diuretics Heart medicines Some antidepressants Narcotic analgesics Alcohol Other causes of low blood pressure include the following: Dehydration Heart failure Heart attack Changes in heart rhythm (

2. Orthostatic Hypotension Information Page: National Institute Of Neurological Dis Information sheet on orthostatic hypotension including the treatment and prognosis. http://www.ninds.nih.gov/disorders/orthostatic_hypotension/orthostatic_hypotensi

Accessible version Science for the Brain The nation's leading supporter of biomedical research on disorders of the brain and nervous system More about Orthostatic Hypotension Studies with patients Research literature Press releases Search NINDS... (help) Contact Us My Privacy NINDS is part of the National Institutes of Health You are here: Home Disorders Orthostatic Hypotension NINDS Orthostatic Hypotension Information Page Synonym(s): Postural Hypotension, Bradbury-Eggleston Syndrome Get Web page suited for printing Email this to a friend or colleague Table of Contents (click to jump to sections) What is Orthostatic Hypotension? Is there any treatment? What is the prognosis? What research is being done? ... Organizations What is Orthostatic Hypotension? Orthostatic hypotension is a sudden fall in 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, 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. Symptoms, which generally occur after sudden standing, include dizziness, lightheadedness, blurred vision, and syncope (temporary loss of consciousness).

3. Evaluation And Treatment Of Orthostatic Hypotension Article from the American Family Physician Journal. http://www.aafp.org/afp/971001ap/engstrm.html

4. Blood Pressure, Low Hypotension Alternative names Return to top. hypotension; Low blood pressure cause type of low blood pressure is orthostatic hypotension, which results http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

5. MedlinePlus: Low Blood Pressure Clinical Trials; ClinicalTrials.gov hypotension (National Institutes of Health); ClinicalTrials.gov ShyDrager Syndrome (National Institutes of Health) http://www.nlm.nih.gov/medlineplus/lowbloodpressure.html

@import url(http://www.nlm.nih.gov/medlineplus/images/advanced.css); Skip navigation Other health topics: A B C D ... List of All Topics Low Blood Pressure Contents of this page: Overviews Diagnosis/Symptoms Organizations Seniors ... Information from the Medical Encyclopedia Search MEDLINE/PubMed for recent research articles on Low Blood Pressure You may also be interested in these MedlinePlus related pages: High Blood Pressure Heart and Circulation Overviews Blood Pressure (American Heart Association) Also available in: Spanish Low Blood Pressure (American Heart Association) Diagnosis/Symptoms Blood Pressure Testing and Measurement (American Heart Association) Tilt-Table Test (Mayo Foundation for Medical Education and Research) Specific Conditions Autonomic Nervous System (American Heart Association) Multiple System Atrophy with Orthostatic Hypotension (National Institute of Neurological Disorders and Stroke) - Short Summary Orthostatic Hypotension (National Institute of Neurological Disorders and Stroke) - Short Summary Severe Drop in Blood Pressure on Standing: What Causes This?

6. The Center For Pediatric Hypotension Information about the investigation, evaluation, and treatment of adolescents and children with syncope, orthostatic tachycardia, and other forms of chronic orthostatic intolerance including CFS. http://www.syncope.org/

syncope.org;http://www.nymc.edu/fhp/centers/syncope; syncope.org;http://www.nymc.edu/fhp/centers/syncope;

7. Orthostatic Hypotension Information Page National Institute Of Orthostatic hypotension (a sudden fall in blood pressure that occurs when a person stands up) information sheet compiled by the National Institute of http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

8. ORTHOSTATIC HYPOTENSION Orthostasis means upright posture, and hypotension means low blood pressure. Thus, orthostatic hypotension consists of symptoms of dizziness, faintness or http://www.dizziness-and-balance.com/disorders/medical/orthostatic.html

ORTHOSTATIC HYPOTENSION Timothy C. Hain, MD. Please read our Return to Index Page last modified: September 4, 2005 Orthostasis means upright posture, and hypotension means low blood pressure. Thus, orthostatic hypotension consists of symptoms of dizziness, faintness or lightheadedness which appear only on standing, and which are caused by low blood pressure. Only rarely is spinning vertigo caused by orthostasis. Symptoms that often accompany orthostatic hypotension include chest pain, trouble holding the urine, impotence, and dry skin from loss of sweating. What Causes Orthostatic Hypotension ? Blood pressure is maintained by a combination of several things. The heart is the central pump, and a weak or irregular heart can cause orthostasis. Conditions such as arrhythmia, heart failure, deconditioning, and pregnancy are examples where the heart may not be up to the task of providing an adequate blood pressure. The heart pumps blood, and if there is too little blood volume (anemia, dehydration, dialysis), the pressure drops. The blood vessels in the body also can squeeze (constrict) to raise blood pressure, and if this action is paralyzed, blood pressure may fall. Numerous medications affect blood vessels including most of the medications used for blood pressure, and many of the medications used in psychiatry and for anginal heart pain. Heat, such as a hot shower or from a fever can also dilate blood vessels and cause orthostasis. The nervous system senses and responds to regulate blood pressure. If something is wrong in this control system, blood pressure may fluctuate.

9. For Parents Of Sick And Worn-Out Children Deals with pediatric chronic fatigue syndrome, neurally mediated hypotension, fibromyalgia and other related syndromes. By Frank Albrecht, PhD. http://www.bluecrab.org/health/sickids/sickids.htm

10. The CFIDS Association Of America Chronic fatigue syndrome information, support and advocacy resources, including a grassroots online action center. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

11. Orthostatic Hypotension - December 15, 2003 - American Family Physician Orthostatic hypotension is a physical finding defined by the American Autonomic Several potential causes of orthostatic hypotension include medications; http://www.aafp.org/afp/20031215/2393.html

Advanced Search AAFP Home Page Journals Vol. 68/No. 12 (December 15, 2003) PROBLEM-ORIENTED DIAGNOSIS Orthostatic Hypotension JOHN G. BRADLEY, M.D., and KATHY A. DAVIS, R.N. Southern Illinois University School of Medicine, Decatur, Illinois A PDF version of this document is available. Download PDF now (6 pages /76 KB). More information on using PDF files. See page 2306 for definitions of strength-of-evidence levels. O rthostatic hypotension, which is a physical finding, not a disease, may be symptomatic or asymptomatic. The American Autonomic Society (AAS) and the American Academy of Neurology (AAN) define orthostatic hypotension as a systolic blood pressure decrease of at least 20 mm Hg or a diastolic blood pressure decrease of at least 10 mm Hg within three minutes of standing up. [Evidence level C, consensus/expert guidelines] The AAS and AAN also provide a tilt-table definition. This determination has limited usefulness for the approach outlined in this article and appears to have a high rate of false-positive results. Orthostatic hypotension has been observed in all age groups, but it occurs more frequently in the elderly, especially in persons who are sick and frail.

12. THE MERCK MANUAL, Sec. 16, Ch. 200, Orthostatic Hypotension And Syncope An article about orthostatic hypotension and syncope. http://www.merck.com/pubs/mmanual/section16/chapter200/200b.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 Syncope (Fainting) A sudden brief loss of consciousness, with loss of postural tone. Etiology and Pathophysiology Bradyarrhythmias (especially those with abrupt onset) can cause syncope. These include the sick sinus syndrome, with or without tachyarrhythmias, and high-grade atrioventricular block. Although bradyarrhythmias occur at all ages, they are most frequent in the elderly and are usually due to ischemia or fibrosis of the conduction system. Digitalis, -blockers (including ophthalmic -blockers), Ca blockers, and other drugs may also cause bradyarrhythmias. Supraventricular or ventricular tachyarrhythmias that cause syncope may be related to ischemia, heart failure, drug toxicity (quinidine syncope is the best known), electrolyte abnormalities, preexcitation, and other disorders. Syncope with chest pain of myocardial ischemia is usually related to arrhythmia or heart block but rarely may reflect substantial ischemic ventricular dysfunction with a reduced cardiac output. Syncope can be due to atrioventricular block in acute inferior MI. Many other mechanisms, often in combination, may limit cardiac output, such as a decrease in systemic BP due to peripheral vasodilation, decreased venous return to the heart, hypovolemia, and cardiac outflow obstruction. Diminished cerebral perfusion may also be caused by cerebral vasoconstriction, eg, induced by hypocapnia.

13. Welcome Information and support concerning autonomic nervous system disorders. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

14. THE MERCK MANUAL, Sec. 16, Ch. 200, Orthostatic Hypotension And Orthostatic hypotension is not a specific disease but rather a Orthostatic hypotension is more frequent in diabetic than nondiabetic patients treated http://www.merck.com/mrkshared/mmanual/section16/chapter200/200a.jsp

15. Subdural Haematoma A Potentially Serious Consequence Of Your browser does not support frames. Click here to view the unframed reprint. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

16. THE MERCK MANUAL--SECOND HOME EDITION, Postprandial Hypotension In Ch. 23, Low B Postprandial hypotension is an excessive decrease in blood pressure that occurs Postprandial hypotension occurs in up to one third of older people but http://www.merck.com/mmhe/sec03/ch023/ch023d.html

var externalLinkWarning = "The link you have selected will take you to a site outside Merck and The Merck Manuals.*n*nThe Merck Manuals do not review or control the content of any non-Merck site. The Merck Manuals do not endorse and are not responsible for the accuracy, content, practices, or standards of any non-Merck sources."; Search The Second Home Edition , Online Version Search Index A B C D ... Z Sections Accidents and Injuries Blood Disorders Bone, Joint, and Muscle Disorders Brain, Spinal Cord, and Nerve Disorders ... Women's Health Issues Resources Anatomical Drawings Multimedia Pronunciations Weights and Measures ... , Online Version Section Heart and Blood Vessel Disorders Chapter Low Blood Pressure Topics Introduction Fainting Orthostatic Hypotension Postprandial Hypotension Postprandial Hypotension Buy The Book Print This Topic Email This Topic Pronunciations atrophy ergotamine Postprandial hypotension is an excessive decrease in blood pressure that occurs after a meal. Postprandial hypotension occurs in up to one third of older people but virtually never occurs in younger people. It is more likely to occur in people who have high blood pressure or disorders that impair the brain centers controlling the autonomic nervous system (which regulates internal body processes). Examples of such disorders are Parkinson's disease, multiple systems atrophy (Shy-Drager syndrome), and diabetes. The intestines require a large amount of blood for digestion. When blood flows to the intestines after a meal, the heart rate increases and blood vessels in other parts of the body constrict to help maintain blood pressure. However, in some older people, such mechanisms may be inadequate. Blood flows normally to the intestines, but the heart rate does not increase adequately and blood vessels do not constrict enough to maintain blood pressure. As a result, blood pressure falls.

17. The Pediatric Network For Chronic Fatigue Syndrome, Fibromyalgia, And Orthostati Resources for all concerned with pediatric chronic fatigue syndrome, fibromyalgia, neurally mediated hypotension, postural orthostatic tachycardia syndrome, and related conditions. http://www.pediatricnetwork.org

for Chronic Fatigue Syndrome, Fibromyalgia, and Orthostatic Intolerance Home News Forum Contribute ... Forum Hot Topics Stay Connected! Welcome to this network for parents, youth, and professionals concerned with chronic fatigue syndrome, fibromyalgia, and orthostatic intolerance. Please read our welcome letter here. See our live chat announcements and website updates below. Share our brochures to help others become a part of this network. Subscribe to our e-mail list to receive occasional updates from us. Participate in forum discussions to hear about others' medical and school experiences, and to learn of opportunities to volunteer, participate in studies, or meet other families. Learn how to join the forum here or e-mail us with your questions. Today's Tip: Please Support Our Work: Donate : Learn how you can contribute through direct gifts, shopping at Amazon.com, or applying for a VISA card Shop Amazon.com through our store . Explore products like these: Search Now: Welcome to the Pediatric Network! News and Forum Highlights Welcome back to the forum!

18. Subdural Haematoma A Potentially Serious Consequence Of Subdural haematoma a potentially serious consequence of spontaneous intracranial hypotension R J de Noronha1 , B Sharrack2 http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

19. Hypotension - Wikipedia, The Free Encyclopedia Reduced blood volume, called hypovolemia, can also cause hypotension and often results from Retrieved from http//en.wikipedia.org/wiki/hypotension http://en.wikipedia.org/wiki/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 Hypotension From Wikipedia, the free encyclopedia. In physiology and medicine hypotension refers to an abnormally low blood pressure . It is often associated with shock , though not necessarily indicative of it. Contents Causes Indicators Symptoms References ... edit Causes Orthostatic hypotension is a common cause of low blood pressure , resulting from a sudden change in body position. Reduced blood volume, called hypovolemia , can also cause hypotension and often results from the use of diuretics or vasodilators such as nitric oxide or furosemide . It has been recorded as a side-effect of certain forms of anesthesia , such as curare , in which event it is often treated by the anesthesiologist . Another albeit rare form, is "post prandial hypotension", which occurs 30-75 minutes after eating. It is not well understood. edit Indicators For most individuals, a healthy blood pressure lies between 90/60 mmHg to 130/80 mmHg. A small drop in blood pressure, even as little as 20 mmHg, can result in transient hypotension.

20. On Health With WebMD A discussion of hypotension and its symptoms. http://www.onhealth.com/conditions/resource/conditions/item,46337.asp

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