abnormally low blood pressure occurs when an individual stands too quickly from a lying position.

A sudden decrease in blood pressure that occurs when the affected individual sits up or stands. In some cases, it may occur as a side effect of certain medications.

decrease in blood pressure related to positional or postural changes from lying to sitting or standing positions

Low blood pressure with dizziness, fainting, and blurred vision upon standing or when standing motionless in a fixed position.

a rapid decrease in blood pressure upon standing. It may cause fainting.

A drop in blood pressure during rapid changes in body position (e.g., from sitting to standing).

low blood pressure occurring in some people when they stand up

Decrease in blood pressure upon assuming erect posture.

A fall in blood pressure when standing; may result in fainting.

Drop in blood pressure upon standing; may lead to light-headedness or fainting.

Lowering of blood pressure with a change of body position from supine to erect.

Drop in blood pressure brought on by changes in body position, such as rising from a chair or bed.

a drop in blood pressure upon standing; can cause fainting

decrease in blood pressure occurring when an individual arises from a seated or lying position. A small decrease in blood pressure is normal, but large decreases are abnormal, especially if accompanied by clinical manifestations such as faintness, light-headedness, dizziness, or increased pulse. Orthostatic hypotension is a common finding in patients with malaria infections. The patient may complain of notable tiredness after conducting light office work, etc. arasitaemia - the status of having parasites. This term is often used to express the quantity of parasites in the blood. If no fever or other symptoms are present, the condition is referred to as 'asymptomatic parasitaemia.'

A decrease in blood pressure upon standing. In PD this may occur either spontaneously or as a result of drug treatment

Low blood pressure when standing erect.

A temporary lowering of blood pressure (hypotension) due usually to suddenly standing up (orthostatic). Orthostatic hypotension may be experienced by healthy people -- it is more common in older people -- who rise quickly from a chair, especially after a meal, and have a few seconds of disorientation. See the entire definition of Orthostatic hypotension

A sudden drop in blood pressure that occur when a person stands up. Can cause fainting.

Orthostatic hypotension is a temporary and short-lived condition of low blood pressure sometimes occurring when a person stands or sits upright from a sitting or recumbent position; it can result in light-headedness or fainting.

Orthostatic hypotension is a sudden decrease in blood pressure that occurs when a person goes from a lying or sitting to a standing position.

Low blood pressure upon standing that may lead to light-headedness or passing out.

A drop in blood pressure resulting in mild to severe dizziness that can happen with a change in position from lying to sitting. The dizziness results from decreased circulation to the brain because blood pools in the abdomen and legs.

a large decrease in blood pressure upon standing; may result in fainting.

A decrease of systolic and diastolic blood pressure with positional changes. Occurs when a person assumes an upright position from a supine position. Usually exacerbated after prolonged bed rest

Orthostatic hypotension (also known as postural hypotension and, colloquially, as head rush or a dizzy spell) is a sudden fall in blood pressure, typically greater than 20/10 mm Hg, that occurs when a person assumes a standing position.