ISSN:
1432-1084
Keywords:
Arteriovenous Malformations
;
Celebral
;
Endovascular Therapy
;
MRI
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract Of 86 patients with whose cerebral arteriovenous malformations (AVMs) were embolised in the period 1985–1990 29 were examined by high-field spin-echo (SE) magnetic resonance imaging (MRI) after endovascular therapy with gistoacryl-lipiodol. Embolisation-related changes in the nidus of the AVM and in the surrounding brain parenchyma were assessed. Results were compared with pretreatment MR and CT, and with follow-up angiograms in all patients. In accordance with angiographic findings, complete obliteration of pathological vessels was noted in 7 patients (24.1%) and partial occlusion in 22 (75.9%); small ischaemic infarcts were observed in 8 patients (27.6%) and extravascular deposits of blood breakdown products were seen in 3 (10.3%). MRI is a valuable noninvasive technique for assessing morphology and haemodynamics of cerebral AVMs before and after treatment. However, following embolotherapy, variable effects on signal intensity in vascular lumina caused by flowing blood, thrombosis and the embolisation agent have to be carefully analysed. To assess the exact site of histoacryl-lipiodol in embolised nidus territories or small areas of possible intracerebral hemorrhage, the time interval between endovascular therapy and MR examinations may have to be modified.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00540104
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