| Intracortical EEG for the detection of vasospasm in patients with poor-grade subarachnoid hemorrhage. | |
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MedLine Citation:
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PMID: 20652443 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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BACKGROUND: To study the feasibility of utilizing intracortical electroencephalography (ICE) including quantitative EEG (qEEG) analysis for the detection of vasospasm in five consecutive poor-grade SAH patients. METHODS: Intracortical electroencephalography (ICE) was obtained via a single miniature parenchymal 8-contact depth electrode placed at the bedside. Quantitative EEG parameters, calculated on surface EEG and ICE, included alpha/delta ratio (ADR), mean amplitude, suppression percent, and total power. Percent changes between averaged values over 4-6 h of baseline EEG and EEG prior to angiography were calculated. The entire continuous qEEG recording for each patient was then reviewed to determine optimal automated alarm criteria. RESULTS: ICE ADR was the most accurate for predicting angiographic vasospasm (5/5). ICE ADR decreased between baseline and follow-up by 42% (from 0.56 ± 0.07 to 0.32 ± 0.03) for those with vasospasm (N = 3) compared to 17% (0.62 ± 0.06 to 0.51 ± 0.03) for those without (N = 2). A sustained decrease in the ICE ADR from baseline (>25% for ≥ 4 h) occurred in all three patients with angiographically confirmed vasospasm and not in the two without; this decline occurred 1-3 days prior to angiographic confirmation. CONCLUSIONS: Intracortical EEG is promising for detecting ischemia from vasospasm in poor-grade SAH patients, may be superior to scalp EEG, and allow automated detection, particularly using the ADR. Larger studies are needed to better define the effectiveness of this approach. |
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Authors:
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R Morgan Stuart; Allen Waziri; David Weintraub; Michael J Schmidt; Luis Fernandez; Raimund Helbok; Pedro Kurtz; Kiwon Lee; Neeraj Badjatia; Ron Emerson; Stephan A Mayer; E Sander Connolly; Lawrence J Hirsch; Jan Claassen |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Neurocritical care Volume: 13 ISSN: 1556-0961 ISO Abbreviation: Neurocrit Care Publication Date: 2010 Dec |
Date Detail:
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Created Date: 2010-11-26 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101156086 Medline TA: Neurocrit Care Country: United States |
Other Details:
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Languages: eng Pagination: 355-8 Citation Subset: IM |
Affiliation:
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Department of Neurological Surgery, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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