| Prediction of cerebral hyperperfusion syndrome after carotid stenting: a cerebral perfusion computed tomography study. | |
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MedLine Citation:
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PMID: 19638846 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: The objective of this study was to evaluate the role of cerebral perfusion computed tomography (CT) in predicting cerebral hyperperfusion syndrome (CHS) after carotid stenting. MATERIALS AND METHODS: This study was approved by the institutional review board, and written informed consent was obtained from all patients. Fifty-five consecutive symptomatic patients with greater than or equal to 70% of cervical carotid artery stenosis who underwent carotid stenting from March 2001 to December 2003 were recruited. Age, sex, stenting side, and degree of cervical carotid stenosis at the stenting and contralateral sides were recorded. Cerebral perfusion CT was performed 1 day before stenting. Absolute values of the cerebral blood volume, mean transit time, and cerebral blood flow were calculated. Relative values based on the comparison between ipsilateral and contralateral hemispheres, that is, relative cerebral blood volume (ipsilateral-to-contralateral ratio), relative cerebral blood flow (ipsilateral-to-contralateral ratio), and absolute difference in mean transit time (dMTT), were derived. The association between occurrence of CHS and parameters of cerebral perfusion CT was investigated by the Mann-Whitney U test. RESULTS: Three (5%) of 55 patients had CHS after carotid stenting. The only significant factor related to the occurrence of CHS was dMTT (P = 0.003). A dMTT value of 3 seconds was considered as a cutoff value to distinguish between the occurrence and absence of CHS. The other clinical or cerebral perfusion CT parameters had no significant correlation with the occurrence of CHS. CONCLUSION: Our findings suggest that patients with a prolonged dMTT of more than 3 seconds should be closely monitored for evidence of hyperperfusion after undergoing carotid stenting. |
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Authors:
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Ying-Chi Tseng; Hui-Ling Hsu; Tsong-Hai Lee; I-Chang Hsieh; Chi-Jen Chen |
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Publication Detail:
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Type: Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of computer assisted tomography Volume: 33 ISSN: 1532-3145 ISO Abbreviation: J Comput Assist Tomogr Publication Date: 2009 Jul-Aug |
Date Detail:
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Created Date: 2009-07-29 Completed Date: 2009-08-27 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7703942 Medline TA: J Comput Assist Tomogr Country: United States |
Other Details:
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Languages: eng Pagination: 540-5 Citation Subset: IM |
Affiliation:
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Department of Radiology, Cathay General Hospital, Taipei, Taiwan, Republic of China. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aged Aged, 80 and over Brain / blood supply, radiography Carotid Stenosis / surgery Cerebrovascular Circulation* Cerebrovascular Disorders / etiology*, prevention & control*, radiography Contrast Media / diagnostic use Female Headache / etiology, prevention & control, radiography Humans Hypertension / etiology, prevention & control*, radiography Male Middle Aged Perfusion Imaging / methods Postoperative Complications / etiology, prevention & control*, radiography Predictive Value of Tests Prospective Studies Radiographic Image Enhancement / methods Risk Factors Seizures / etiology, prevention & control, radiography Stents / adverse effects* Syndrome Time Factors Tomography, X-Ray Computed / methods* Triiodobenzoic Acids / diagnostic use |
| Chemical | |
Reg. No./Substance:
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0/Contrast Media; 0/Triiodobenzoic Acids; 87771-40-2/ioversol |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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