Defining abnormal slow EEG activity in acute ischaemic stroke: delta/alpha ratio as an optimal QEEG index

Ischaemic stroke (IS) produces abnormal, slow EEG activity - particularly in the delta frequency range (1-4 Hz) - and attenuation of normative, faster activity, particularly in the alpha frequency range (8-12 Hz; e.g., Jordan, 2004; Hirsch et al., 2013). A recent review (Finnigan and van Putten, 2013) emphasises that particular QEEG indices, which are sensitive to such cerebral pathophysiology following IS, can inform clinical decision-making including: (1) continuous monitoring to inform about the efficacy of acute reperfusion therapies, and; (2) outcome prognostication and clinical management decisions based on brief, pre-discharge EEG.

Source: Clinical Neurophysiology - July 21, 2015 Category: Neuroscience Authors: Simon Finnigan, Andrew Wong, Stephen Read Source Type: research