Pediatric Research -- Abstracts: STEWART 48 (2): 218 Autonomic Nervous System Dysfunction in Adolescents with postural orthostatic tachycardia syndrome and Chronic Fatigue Syndrome Is Characterized by Attenuated http://www.pedresearch.org/cgi/content/abstract/48/2/218
Extractions: International Pediatric Research Foundation, Inc. JULIAN M. STEWART Department of Pediatrics, The Center for Pediatric Hypotension, New York Medical College, Valhalla, New York 10595, U.S.A. Correspondence: Julian M. Stewart, M.D., Ph.D., The Center for Pediatric Hypotension and Division of Pediatric Cardiology, Suite 618, Munger Pavilion, New York Medical College, Valhalla, NY 10595, U.S.A. The objective was to determine the nature of autonomic and vasomotor changes in adolescent patients with orthostatic tachycardia associated with the chronic fatigue syndrome (CFS) and the postural orthostatic tachycardia syndrome (POTS). Continuous electrocardiography
Disorders Of The Autonomic Nervous System Targeted Pharmacologic The postural orthostatic tachycardia syndrome a potentially treatable cause of chronic fatigue, exercise intolerance, and cognitive impairment in adolescents. http://www.medscape.com/viewarticle/416459
NEJM -- The Neuropathic Postural Tachycardia Syndrome Background The postural tachycardia syndrome is a common disorder that is characterized by chronic orthostatic symptoms and a dramatic increase in heart rate http://content.nejm.org/cgi/content/short/343/14/1008
Extractions: Add to Personal Archive Add to Citation Manager ... Chapters at Harrison's ABSTRACT Background The postural tachycardia syndrome is a common disorder that is characterized by chronic orthostatic symptoms and a dramatic increase in heart rate on standing, but that does not involve orthostatic hypotension. Several lines of evidence indicate that this disorder may result from sympathetic denervation of the legs. Methods We measured norepinephrine spillover (the rate of entry of norepinephrine into the venous circulation) in the arms and legs both before and in response to exposure to three stimuli (the cold pressor test, sodium nitroprusside infusion, and tyramine
Postural Tachycardia Syn (POTS) SC AU Schondorf R AU - Suarez GA AU - Fealey RD AU - Camilleri M TI - Comparison of the postural tachycardia syndrome (POTS) with orthostatic hypotension due http://neuro-www.mgh.harvard.edu/neurowebforum/AutonomicArticles/1.15.9710.47PMP
Extractions: ORTHOSTATIC HYPOTENSION Timothy C. Hain, MD. Please read our Return to Index Search this site Page last modified: February 2, 2004 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. Vertigo and orthostatis may co-exist however. Symptoms that often accompany orthostatic hypotension include chest pain, trouble holding the urine, impotence, and dry skin from loss of sweating. 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.
Orthostatic Intolerance Syndromes Vasoregulatory Asthenia. Currently, there are three main categories used to describe orthostatic Intolerance Conditions postural tachycardia syndrome (POTS). http://www.ndrf.org/orthostat.htm
Extractions: Be sure to visit the NDRF Reference Page where you can learn more about the NDRF Patient Handbook, Videos and other reference materials. Definitions History Symptoms ... Prognosis Definitions It is estimated that over 500,000 Americans are afflicted with Orthostatic Intolerance. Despite the enormity of the number, these conditions are among the least understood of the autonomic disorders. Affecting predominately younger individuals, often in those under the age of thirty five, these syndromes affect more women than men. The onset can be sudden, and the impact can be significant on both lifestyle and on the capacity to work. Often, these conditions tend to be misdiagnosed as either a psychiatric or anxiety - related disorders, due to the nature of the symptoms. Standing upright results in a series of reflexive bodily responses, regulated by the Autonomic Nervous System , to compensate for the effect of gravity upon the distribution of blood. These conditions are a result of an inappropriate response to this change in body position.
FOR PARENTS OF SICK AND WORN-OUT CHILDREN (CFS, CFIDS, NMH, ME, FM syndrome (CFS); Chronic Fatigue Immune Dysfunction syndrome (CFIDS); Neurally Mediated Hypotension (NMH); postural orthostatic tachycardia (POTS); Fibromyalgia (FMS http://www.bluecrab.org/health/sickids/sickids.htm
JW Neurology -- Sign In postural tachycardia syndrome (POTS) is characterized by orthostatic tachycardia and symptoms of intolerance without orthostatic hypotension. http://neurology.jwatch.org/cgi/content/full/2000/1122/4
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ORTHOSTATIC INTOLERANCE two, systematic orthostatic tachycardia (SOTS) and postural orthostatic tachycardia (POTS), are malfunction is taking place in all three orthostatic syndromes. http://www.geocities.com/HotSprings/5983/orthostatic.htm
Extractions: ORTHOSTATIC INTOLERANCE A common increase in the severity of symptoms often occurs in PWC's while standing. According to a study by Dr. Lapp there are 4 responses to the tilt table test / standing up without movement. The most commonly know is neuro mediated hypotenstion (NMH), which is characterized by a sudden drop in blood pressure and heart rate accompanied by the symptoms of dizzyness, nausea, weakness, fainting and sweating. The next two, systematic orthostatic tachycardia (SOTS) and postural orthostatic tachycardia (POTS), are related with a increase in heart rate above normal, palpitations and the symptoms of nausea, sweating , dizzyness, and headache. They differ in the amount of time before increased symptoms (sots= 10 min , pots=5 min). The last response is that of a typical healthy individual Rescently allot of press has been given to neuro mediated hypotention, but a study has reported a higher incidence of SOTS (at 28%) compared to NMH (at 24%) in the CFIDS population. (48% had a healthy response to standing) It seems that a common system malfunction is taking place in all three orthostatic syndromes. Researchers speculate that PWC's have low blood volume and pooling of the blood in the legs. Possible reasons for this abnormality could stem from miscommunication between the heart and the brain or damage to the long nerves responsible for blood vessel contriction. It is also assumed that low blood volume contibutes to cardiac abnormalities because of the reduced amount of blood in the heart.
ORTHOSTATIC HYPOTENSION Side effects may include tachycardia, tremor and postural vertigo and impaired vasoreflexes caused by a orthostatic hypotension from sympathetic denervation in http://www.parkinson.org/orthohypotension.htm
Extractions: ORTHOSTATIC HYPOTENSION Timothy C. Hain, MD. Please read our Return to Index . Content last updated: 12/2002 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. 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.
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