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Electroencephalography in lacunar infarction

G W Petty1, D R Labar, B J Fisch

  • 1Department of Neurology, College of Physicians and Surgeons of Columbia University, New York, NY, USA.

Journal of the Neurological Sciences
|December 1, 1995
PubMed
Summary
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Mild electroencephalographic (EEG) abnormalities are common in acute lacunar infarction, even without prior stroke history. Major EEG abnormalities can help exclude lacunar infarction in the early stages.

Area of Science:

  • Neurology
  • Neurophysiology

Background:

  • Acute lacunar infarction is a type of stroke affecting small deep brain arteries.
  • Electroencephalography (EEG) is a tool to measure electrical activity in the brain.
  • The prevalence and significance of EEG abnormalities in acute lacunar infarction are not well-established.

Purpose of the Study:

  • To investigate the occurrence and clinical implications of EEG abnormalities in patients with acute lacunar infarction.
  • To assess the utility of EEG in diagnosing lacunar infarction, especially when neuroimaging is inconclusive.

Main Methods:

  • A single-blinded EEG study was conducted.
  • 55 patients with acute lacunar infarction were included.
  • Clinical history, radiological evidence, and EEG findings were analyzed.

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Main Results:

  • 53% of patients exhibited mild EEG abnormalities.
  • Focal, ipsilateral abnormalities were seen in 13% of patients.
  • Mild EEG abnormalities were present in 43% of patients without prior stroke history, suggesting a higher incidence than previously assumed.
  • No major EEG abnormalities were observed in patients with their first lacunar infarction.

Conclusions:

  • Mild EEG abnormalities are more frequent in acute lacunar infarction than commonly believed and do not rule out the diagnosis.
  • In the early phase of ischemic infarction (within 48 hours), a significant finding of lateralized major EEG abnormalities can help exclude lacunar infarction or brainstem infarction, particularly when CT scans are negative.