Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology
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To appraise the controversial prognostic significance of postanoxic alpha or theta coma (ATC). ⋯ This study and a review 283 cases of postanoxic ATC reported in the literature suggest the existence of incomplete and complete variants of postanoxic ATC. Whereas complete ATC is invariably associated with a poor outcome, full recovery is possible in patients with incomplete ATC. The combination of EEG, clinical, and SEP findings improves the prognostic accuracy of postanoxic ATC.