symptoms of heart and blood vessel disorders
heart and blood vessel disorders
Dizziness or Light Headedness When Standing Up
Dizziness or light-headedness when standing occurs in about 20% of older people. It is more common among people with coexisting disorders, especially high blood pressure, and among residents of long-term care facilities. Many falls may result from dizziness when standing. Older people should avoid prolonged standing. The increased incidence in older people is due to decreases in the responsiveness of the receptors that manage blood pressure plus increases in arterial wall stiffness, which make it more difficult for arteries to move more blood to increase blood pressure. Decreases in receptor responsiveness delay the normal heart and blood vessel responses to standing. Paradoxically, high blood pressure, which is more common among older people, may contribute to poor receptor sensitivity, increasing vulnerability to dizziness when standing. 