Dysautonomia refers to a disorder of autonomic nervous system (ANS) function that generally involves failure of the sympathetic or parasympathetic components of the ANS, but dysautonomia involving excessive or overactive ANS actions also can occur.
Dysautonomia can be local, as in reflex sympathetic dystrophy, or generalized, as in pure autonomic failure. It can be acute and reversible, as in Guillain-Barre syndrome, or chronic and progressive. Several common conditions such as diabetes and alcoholism can include dysautonomia.
Dysautonomia also can occur as a primary condition or in association with degenerative neurological diseases such as Parkinson's disease. Other diseases with generalized, primary dysautonomia include multiple system atrophy and familial dysautonomia.
Hallmarks of generalized dysautonomia due to sympathetic failure are impotence (in men) and a fall in blood pressure during standing (orthostatic hypotension). Excessive sympathetic activity can present as hypertension or a rapid pulse rate.
There is usually no cure for dysautonomia. Secondary forms may improve with treatment of the underlying disease. In many cases treatment of primary dysautonomia is symptomatic and supportive. Measures to combat orthostatic hypotension include elevation of the head of the bed, water bolus (rapid infusion of water given intravenously), a high-salt diet, and drugs such as fludrocortisone and midodrine.
The outlook for individuals with dysautonomia depends on the particular diagnostic category. People with chronic, progressive, generalized dysautonomia in the setting of central nervous system degeneration have a generally poor long-term prognosis. Death can occur from pneumonia, acute respiratory failure, or sudden cardiopulmonary arrest.
The NINDS supports and conducts research on dysautonomia. This research aims to discover ways to diagnose, treat, and, ultimately, prevent these disorders.
P.O. Box 301
Red Wing, MN 55066-0301
Tel: 651-327-0367 Fax: 651-267-0524
55 Kenosia Avenue
Danbury, CT 06810
Tel: 203-744-0100; Voice Mail: 800-999-NORD (6673)
315 W. 39th Street
New York, NY 10018
121 South Estes Drive
Chapel Hill, NC 27514-2868
9935-D Rea Road
Charlotte, NC 28227
1301 Greengate Court
Waldorf, MD 20601
*Source: National Institutes of Health; National Institute of Neurological Disorders and Stroke NINDS*
© Copyright 1995-2020 The Cleveland Clinic Foundation. All rights reserved.
This information is provided by the Cleveland Clinic and is not intended to replace the medical advice of your doctor or healthcare provider. Please consult your healthcare provider for advice about a specific medical condition. This document was last reviewed on: 08/11/2015