Abstract
Systemic hypertension has been associated with impairment in cognitive performance, and both structural and functional brain abnormalities.(1) The electroencephalogram (EEG) is a cheap and noninvasive investigation, but virtually no information is available on the effects of high blood pressure, if any, on cerebral electrogenesis. Here, we show that low-amplitude EEG is considerably more common in hypertensive patients than in the general population, and associated with cognitive impairment.