[Ultrasonographic study of the cerebral circulation in elderly subjects (author's transl)].
The amount of diastolic blood flow in the carotid and vertebral axes determines the tolerance capacity of the cerebral circulation to physiological variations. In the elderly subject this "circulatory reserve" is modified by increases in cerebral circulation resistance, but also by various common cardiac or blood pressure disorders. Furthermore, direct visualization of the atheromatous plaques and calcifications in the vessel walls by ultrasonography can reveal lesions that have no clinical expression.
D000368:Aged; D000375:Aging; D002318:Cardiovascular Diseases / Q000503:physiopathology; D002560:Cerebrovascular Circulation; D006801:Humans; D014463:Ultrasonography; D014655:Vascular Resistance
Etude de la circulation cérébrale du sujet agé par ultrasons.