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Radiology. 1995 Mar;194(3):671-80.

Cerebral dural arteriovenous fistulas: clinical and angiographic correlation with a revised classification of venous drainage.

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1
Service de Neuroradiologie, Hôpital Lariboisiere, Paris, France.

Abstract

PURPOSE:

To review the symptoms and progression of dural arteriovenous fistulas (AVFs) and correlate the findings with various angiographic patterns.

MATERIALS AND METHODS:

Patterns of venous drainage allowed classification of dural AVFs into five types: type I, located in the main sinus, with antegrade flow; type II, in the main sinus, with reflux into the sinus (IIa), cortical veins (IIb), or both (IIa + b); type III, with direct cortical venous drainage without venous ectasia; type IV, with direct cortical venous drainage with venous ectasia; and type V, with spinal venous drainage.

RESULTS:

Type I dural AVFs had a benign course. In type II, reflux into the sinus induced intracranial hypertension in 20% of cases, and reflux into cortical veins induced hemorrhage in 10%. Hemorrhage was present in 40% of cases of type III dural AVFs and 65% of type IV. Type V produced progressive myelopathy in 50% of cases.

CONCLUSION:

This classification provides useful data for determination of the risk with each dural AVF and enables decision-making about the appropriate therapy.

[Indexed for MEDLINE]

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