EEG studies have demonstrated that the hypotension-related poorer mental ability is also reflected in
diminished cortical activity. Contrary to convention, more recent research has suggested a deficient regulation of cerebral blood flow in persons with low blood pressure. In addition to reduced tonic brain perfusion, studies demonstrated insufficient adjustment of blood flow to cognitive requirements.
Chronically low blood pressure is accompanied by a variety of complaints including fatigue, reduced drive, faintness, dizziness, headaches, palpitations, and increased pain sensitivity [1–4]. In addition, hypotensive individuals report cognitive impairment, above all deficits in attention and memory.
Clin Auton Res. 2007 April; 17(2): 69–76.