Effect of hypotensive anaesthesia on mental function in the elderly.
D000368:Aged; D000768:Anesthesia, General; D000775:Anesthesia, Spinal; D004569:Electroencephalography; D006801:Humans; D007023:Hypotension, Controlled; D008297:Male; D008606:Mental Processes / Q000187:drug effects*; D008875:Middle Aged; D011581:Psychological Tests