Stroke-related EEG changes during carotid surgery

Krul, J. M. J.; Ackerstaff, R.G.A.; Eikelboom, B.C.; Vermeulen, F.

doi:10.1016/s0950-821x(89)80050-7

Cited by 23 publications

(4 citation statements)

References 20 publications

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“…This may help to make the procedure safer. Of course, our findings do not apply to strokes developing hours or days after the operation (approximately one third of all perioperative strokes 6 ).…”

contrasting

confidence: 57%

“…Deeply located lacunar ischemic lesions, however, were usually not detected by intraoperative EEG monitoring. 6 Moreover, a computed tomography (CT) study showed that more than 50% of cerebral infarcts during CEA were probably of thromboembolic origin. 7 Detection of embolic signals in the middle cerebral artery (MCA) during CEA is easily achieved with TCD recording.…”

mentioning

confidence: 99%

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Impact of microembolism and hemodynamic changes in the brain during carotid endarterectomy.

Jansen

Ramos

Heesewijk

et al. 1994

Stroke

147

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Background and Purpose Monitoring of carotid endarterectomy with electroencephalography and transcranial Doppler ultrasonography provides instantaneous information about hemodynamic changes and embolic signals. However, a relation between these findings and intraoperative infarcts has not yet been demonstrated.Methods In this study we compared preoperative and postoperative computed tomographic scans (58 patients) or magnetic resonance imaging (40 patients) of the brain, assessed by two independent observers, to detect intraoperative infarcts, and we related any such new lesions to the findings of intraoperative monitoring.Results In the computed tomography series one intraoperative infarct occurred, with corresponding clinical deficits. In the magnetic resonance group four patients developed new lesions that occurred intraoperatively, all of which were clini-

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contrasting

confidence: 57%

mentioning

confidence: 99%

Impact of microembolism and hemodynamic changes in the brain during carotid endarterectomy.

Jansen

Ramos

Heesewijk

et al. 1994

Stroke

147

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“…Indeed, patients in whom changes in electroencephalographic signals are identified have a higher probability of having a stroke. 4,24 An intraoperative ischemic stroke can cause postoperative impairment of cognitive function. Another mechanism is intraoperative microemboli.…”

Section: Discussionmentioning

confidence: 99%

Postoperative cerebral hyperperfusion associated with impaired cognitive function in patients undergoing carotid endarterectomy

Ogasawara

Yamadate²,

Kobayashi³

et al. 2005

Journal of Neurosurgery

111

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“…22 Indeed, patients with EEG changes have a higher probability of having a stroke. 23,24 However, that is not the only mechanism producing a postoperative stroke. A large percentage of patients have evidence of gaseous and particulate emboli in the middle cerebral artery associated with CEA.…”

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confidence: 99%

Neuropsychometric Changes in Patients After Carotid Endarterectomy

Heyer

Adams

Solomon

et al. 1998

Stroke

133

127

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Background and Purpose-One hundred twelve patients undergoing elective carotid endarterectomy for symptomatic and asymptomatic carotid artery stenosis were enrolled in a prospective study to evaluate the incidence of change in postoperative cerebral function. Methods-Patients were evaluated preoperatively and postoperatively before hospital discharge and at follow-up 1 and 5 months later with a battery of neuropsychometric tests. The results were analyzed by both event-rate and group-rate analyses. For event-rate analysis, change was defined as either a decline or improvement in postoperative neuropsychometric performance by 25% or more compared with a preoperative baseline. Results-Approximately 80% of patients showed decline in one or more test scores, and 60% had one or more improved test scores at the first follow-up examination. The percentage of declined test scores decreased and the percentage of improved test scores increased with subsequent follow-up examinations. Group-rate analysis was similar for group performance on individual tests. However, a decline in performance was seen most commonly on verbal memory tests, and improved performance was seen most commonly on executive and motor tests. Conclusions-Neuropsychometric evaluation of patients undergoing carotid endarterectomy for significant carotid artery stenosis demonstrates both declines and improvements in neuropsychometric performance. The test changes that showed decreased performance may be associated with ischemia from global hypoperfusion or embolic phenomena, and the improvement seen may be related to increased cerebral blood flow from removal of stenosis. (Stroke. 1998;29:1110-1115.)

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Stroke-related EEG changes during carotid surgery

Cited by 23 publications

References 20 publications

Impact of microembolism and hemodynamic changes in the brain during carotid endarterectomy.

Impact of microembolism and hemodynamic changes in the brain during carotid endarterectomy.

Postoperative cerebral hyperperfusion associated with impaired cognitive function in patients undergoing carotid endarterectomy

Neuropsychometric Changes in Patients After Carotid Endarterectomy

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