Cerebral hypoperfusion

Cerebral hypoperfusion is inadequate blood flow to the brain. Chronic cerebral hypoperfusion is linked to neurocognitive disorders.

Orthostatic cerebral hypoperfusion syndrome
Novak (2016) states that orthostatic cerebral hypoperfusion syndrome (OCHOs) is defined by:
 * 1) abnormal orthostatic drop of cerebral blood flow velocity (CBFv) during the tilt test and
 * 2) absence of orthostatic hypotension, arrhythmia, vascular abnormalities, or other causes of abnormal orthostatic CBFv

Notable studies

 * 1995, Brainstem perfusion is impaired in chronic fatigue syndrome (Abstract)
 * 2018, The etiologic relation between disequilibrium and orthostatic intolerance in patients with myalgic encephalomyelitis (chronic fatigue syndrome)