The ICV sign as a marker of increased cerebral blood transit time.
Can J Neurol Sci
; 40(2): 187-91, 2013 Mar.
Article
en En
| MEDLINE
| ID: mdl-23419566
ABSTRACT
OBJECTIVE/BACKGROUND:
We describe the internal cerebral vein (ICV) sign, which is a hypo-opacification of the ICV on computed tomogram angiography (CTA) as a new marker of increased cerebral blood transit-time in ipsilateral internal carotid artery occlusions (ICAO).METHODS:
A retrospective analysis of 153 patients with acute unilateral M1 middle cerebral artery (MCA) occlusions ± ICAOs was performed. The degree of contrast opacification of the ICV on the ipsilesional side was compared to that of the unaffected side.RESULTS:
Of 153 patients in our study, 135 had M1 MCA occlusions ± intra-cranial ICAO (M1±iICAO) and 18 had isolated extracranial ICAO (eICAO). In the patients with proximal M1±iICAO, 57/65 (87.1%) showed the ICV sign. Of the 8 patients without the ICV sign in this group, 6 had prominent lenticulostriate arteries arising from the non-occluded M1 segment, 1 had a recurrent artery of Huebner, and 1 had filling of distal ICA/M1 segment through prominent Circle of Willis collaterals. For the 70 patients with isolated distal M1±iICAO, 7/70 (10%) showed the ICV sign, with all 7 showing occluded lenticulostriate arteries. Of the patients with eICAO, 8/18 showed the ICV sign, all 8 with the ICV sign had poor Circle of Willis collaterals.CONCLUSIONS:
The ICV sign correlates well with presence of proximal M1±iICAO in patients with either occluded lenticulostriate arteries or poor Circle of Willis collaterals. In patients with eICAO, the sign correlates with reduced Circle of Willis collaterals and may be a marker of increased ipsilateral cerebral blood transit time.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Arteria Carótida Interna
/
Circulación Cerebrovascular
/
Infarto de la Arteria Cerebral Media
/
Lateralidad Funcional
Tipo de estudio:
Observational_studies
Límite:
Adult
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
Can J Neurol Sci
Año:
2013
Tipo del documento:
Article
País de afiliación:
Canadá