Orthostatic hypotension

Orthostatic hypotension (also known as postural hypotension^[1], and, colloquially, as head rush or a dizzy spell) is a form of hypotension in which there is a sudden (less than 3 minutes) fall in blood pressure, typically greater than 20/10 mm Hg,^[2] that occurs when a person assumes a standing position, usually after a prolonged period of rest.

The incidence increases with age.^[3]

Symptoms

Symptoms, which generally occur after sudden standing, include dizziness, lightheadedness, headache, blurred or dimmed vision (possibly to the point of momentary blindness), generalized (or extremity) numbness/tingling and fainting, coat hanger pain (pain centered in the neck and shoulders), and in rare, extreme cases, vasovagal syncope. They are consequences of insufficient blood pressure and cerebral perfusion (blood supply).

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