Deterioration of ocular motor dysfunction after transvenous embolization of dural arteriovenous fistula involving the cavernous sinus

We treated 9 patients with the dural arteriovenous fistula involving the ca vernous sinus by transvenous embolization. Two patients experienced deterio ration of oculo-motor dysfunction after trans venous embolization. We can s peculate about two different kind of causes by which patients symptoms dete riorated according to the result of intrasinus pressure recorded during the embolization [1]: high intrasinus pressure caused by the obliteration of t he drainage pathway resulted in cranial nerve palsy in one case [2]: implan ted coils directly compressed the cranial nerve in another case. Fortunatel y our cases recovered, but some kind of preventative measures may bs needed in similar cases.