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EEG frequency analysis in the course of acute ischemic stroke

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Summary

In 18 patients with acute cerebrovascular disease (17 ischemic, 1 hemorrhagic stroke) neurological symptoms were scored repeatedly using a rating scale for disturbance of consciousness, motor dysfunctions, disturbance of higher cortical functions, abnormalities of cranial nerves, and impairment of sensations, and related to EEG-abnormalities quantified by frequency analysis. A correspondence between location of neurologic lesion and EEG focus was found in 87%, but correlation between neurologic score and the degree of EEG-abnormality was low. Changes of clinical defects were not significantly related to various quantified EEG parameters. These results suggest that computerized EEG analysis has to be used with caution for quantifying the clinical course of stroke patients.

Zusammenfassung

Der neurologische Status von 18 Patienten mit akuter zerebrovaskulärer Erkrankung (17 ischämische, 1 hämorrhagischer Insult) wurde mit einer Bewertungsskala für Bewußtseinsstörungen, motorische Ausfälle, Störungen höherer Hirnleistungen, Hirnnervenausfälle und Sensibilitätsstörungen wiederholt im Verlauf der Erkrankung erfaßt und zu Veränderungen im EEG, die durch Frequenzanalyse quantifiziert wurden, in Beziehung gesetzt. Die Lokalisation der neurologischen Ausfälle stimmte in 87% mit dem EEG-Herd überein; der Schweregrad der Ausfälle war aber nur gering zum Ausmaß der EEG-Veränderung korreliert. Keine signifikante Beziehung bestand zwischen Änderung der klinischen Ausfälle und quantifizierter EEG-Parameter. Aufgrund dieser Befunde sollten EEG-Analysen nur mit Vorbehalt zur Objektivierung des klinischen Verlaufs nach Schlaganfall angewandt werden.

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Authors and Affiliations

  1. Max-Planck-Institut für Hirnforschung, Forschungsstelle für Hirnkreislaufforschung, Ostmerheimerstraße 200, 5000, Köln 91 (Merheim), Federal Republic of Germany

    K. -A. Hossmann, W. -D. Heiss, H. Bewermeyer & G. Mies

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  1. K. -A. Hossmann
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  2. W. -D. Heiss
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  3. H. Bewermeyer
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  4. G. Mies
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Dedicated to Professor K. J. Zülch on the occasion of his 70th birthday.

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Hossmann, K.A., Heiss, W.D., Bewermeyer, H. et al. EEG frequency analysis in the course of acute ischemic stroke. Neurosurg. Rev. 3, 31–36 (1980). https://doi.org/10.1007/BF01644416

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