National Organization for Rare Disorders, Inc.
It is possible that the main title of the report Orthostatic Hypotension is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.
Orthostatic hypotension (OH) is a common condition characterized as a drop in blood pressure that occurs when a person stands up. OH can cause lightheadedness, dizziness or even causing a person to faint. Symptoms can also be subtle or absent. By definition, the drop in blood pressure must be greater than 20mm Hg of mercury in systolic BP and/or more than 10 mm of mercury in diastolic BP within 3 minutes upon standing from sitting or from a lying down face-up (supine) position. There are numerous, varied causes of OH. Neurogenic orthostatic hypotension (NOH) is a rare subtype caused by underlying neurologic disorders that affect a specific part of the autonomic nervous system. The autonomic nervous system is the part of the nervous system that regulates certain involuntary body functions such as heart rate, blood pressure, sweating, and bowel and bladder control. The treatment of OH depends upon several factors including the specific underlying cause.
NIH/National Institute of Neurological Disorders and Stroke
P.O. Box 5801
Bethesda, MD 20824
Vanderbilt's Autonomic Dysfunction Center
Vanderbilt University Medical Center
1211 Medical Center Drive
Nashville, TN 37232-2195
National Dysautonomia Research Foundation
PO Box 301
Red Wing, MN 55066-0102
Genetic and Rare Diseases (GARD) Information Center
PO Box 8126
Gaithersburg, MD 20898-8126
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Last Updated: 8/27/2014
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