Preoperative MRA Flow Quantification in CEA Patients
| Autor: | D. R. Rutgers, J. D. Blankensteijn, J. van der Grond |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Male
Middle Cerebral Artery medicine.medical_specialty medicine.medical_treatment Cerebral arteries Ischemia Collateral Circulation Carotid endarterectomy Magnetic resonance angiography Brain Ischemia medicine.artery Internal medicine medicine Basilar artery Humans Carotid Stenosis Aged Endarterectomy Advanced and Specialized Nursing Endarterectomy Carotid medicine.diagnostic_test business.industry Electroencephalography Middle Aged medicine.disease Constriction Radiography medicine.anatomical_structure Regional Blood Flow Basilar Artery Cardiology Circle of Willis Female Neurology (clinical) Radiology Cardiology and Cardiovascular Medicine business Carotid Artery Internal Magnetic Resonance Angiography Artery |
| Zdroj: | ResearcherID |
| ISSN: | 1524-4628 0039-2499 |
| Popis: | Background and Purpose —We sought to investigate whether preoperative volume flow in the internal carotid arteries (ICAs), the basilar artery (BA), and the middle cerebral arteries (MCAs) and collateral flow via the circle of Willis differ between patients who do and patients who do not develop cerebral ischemia during clamping of the carotid artery in carotid endarterectomy (CEA). Methods —Quantitative volume flow in the ICAs, BA, and MCAs and directional flow in the circle of Willis were measured preoperatively with 2-dimensional phase-contrast MR angiography in 86 CEA patients. During the operation, electroencephalographic (EEG) recordings were obtained that were monitored by a clinical neurophysiologist. Reference volume flow values were assessed in 24 control subjects. Results —In patients with an ICA stenosis without contralateral ICA occlusion (n=62), of whom 16% developed ischemic EEG changes during clamping, preoperative flow in the clamped ICA was significantly higher in patients with cerebral ischemia than in patients without (mean, 278 versus 160 mL/min; P P P P P Conclusions —Preoperative volume flow in the clamped ICA is significantly higher in CEA patients with ischemic EEG changes during clamping than in CEA patients without such changes. The latter patients probably have better developed collateral pathways preoperatively. |
| Databáze: | OpenAIRE |
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