Effect of Age and Coronary Artery Disease on the Postural Adjustment of Peripheral Circulation

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Abstract
Circulatory regulation tends to minimize gravitational effects of postural changes. The changes of the extracranial volume pulse, recorded by means of an impedance plethysmograph, in tilted head-up and head-down position, are significantly greater in older than in younger men, indicating impairment of circulatory postural regulation with age. Surprisingly enough, this impairment is partially compensated in coronary patients, possibly due to hyperactive carotid sinus reflexes.

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