[Transient ischemic attacks as the only manifestation of a dural arteriovenous fistula].
BACKGROUND
Transient ischemic attacks (TIA), as the only clinical manifestation of a dural arteriovenous malformation, are very seldom seen in clinical practice.


METHODS
We describe the case of a 68 year old male with recurring bouts of right hemiparesis, due to haemodynamic alterations stemming from a dural arteriovenous malformation located in the right middle fossa, with cortical venous drainage towards the superior longitudinal sinus, which hampers the drainage of the left parietal cortical veins. Computerized tomography and magnetic resonance scans performed on admission to hospital revealed blood in the left parietal sulcus, with no parenchymatous lesions. This dural arteriovenous fistula was initially treated by the endovascular administration of polyvinyl alcohol in 150 250 mm particles, but after 11 days the patient again presented symptoms of right hemiparesis which became increasingly frequent and intense. This led to the search for a definitive treatment for the dural arteriovenous fistula with cyanoacrylates. No similar symptoms have been observed in the five years follow up carried out after the embolization.


CONCLUSIONS
In cases of dural arteriovenous fistulas the arterialized cortical vein can impede the drainage of other veins towards the common venous sinus. On very rare occasions this can lead to the appearance of symptoms of transient ischemic attacks in territories that are a long way from the location of the abovementioned arteriovenous malformation.
Delgado-Acosta
F
F
Hospital Universitario Reina Sofía, Cordoba, España. fernandodelgado@seram.org
Bravo-Rodríguez
F
F
Ochoa-Sepúlveda
J J
JJ
Bautista-Rodríguez
M D
MD
D000368:Aged; D020785:Central Nervous System Vascular Malformations / Q000150:complications* / Q000175:diagnosis*; D006801:Humans; D002546:Ischemic Attack, Transient / Q000209:etiology*; D008297:Male