CASE REPORT
Year : 2012  |  Volume : 6  |  Issue : 4  |  Page : 426-428

Can entropy predict neurologic complications after cardiac surgery?


Department of Anaesthesia and Surgical ICU, College of Medicine, University of Dammam, Al Khubar, Saudi Arabia

Correspondence Address:
Mohamed R El Tahan
Department of Anaesthesia and Surgical ICU, College of Medicine, University of Dammam, P.O. 40081, Al Khubar
Saudi Arabia
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/1658-354X.105899

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Electroencephalography can detect both cerebral ischemia/hypoxia and seizures and can measure hypnotic effects. The author reported two patients with left main coronary artery disease and myocardial infarction scheduled for urgent coronary artery bypass grafting surgery; they developed abrupt decreases in response entropy (RE) and state entropy (SE) values to isoelectric silence during target-controlled propofol-sufentanil anesthesia. After that, low RE and SE values persisted throughout the intraoperative period. Both patients showed delayed awakening after surgery and brain CT revealed nonhemorrhagic tempro-parietal cerebral infarctions. Intraoperative entropy-based monitoring could predict poor neurological outcome after cardiac surgery during target-controlled propofol and sufentanil anesthesia.


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