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).

What is the prognosis?

The prognosis for individuals with orthostatic hypotension depends on the underlying cause of the condition.

What research is being done?

The NINDS supports research on conditions such as neurogenic orthostatic hypotension aimed at increasing scientific understanding of the condition and finding ways to treat and prevent it.