Association Between Brain Venous Drainage, Cerebral Aneurysm Formation and Aneurysm Rupture.
OBJECTIVE
The brain venous drainage dominance is generally divided into three groups; right or left dominance and co-dominance. There is no study in the literature examining the link between brain venous drainage and aneurysm formation or rupture. Our aim was to evaluate the association between venous dominancy, aneurysm formation and rupture.


METHODS
Eighty-six patients, who underwent cerebral digital subtraction angiography and who had cerebral aneurysms, were included in the study. The angiographic images, patient charts, and tomography images were scanned retrospectively. We recorded the aneurysm"s location, size, dome to neck ratio (D/N); the patient"s gender, age, whether there was a ruptured aneurysm, smoking history, and/or hypertension; dominance of venous drainage, aneurysm side, Fisher scores and the World Federation of Neurosurgical Societies (WFNS) Grading System for Subarachnoid Hemorrhage scores for patients who had a ruptured aneurysm. We assessed whether or not venous drainage was associated with rupture of the aneurysm and if venous dominance was a predisposing factor for aneurysm formation like location, size, and hypertension.


RESULTS
There was a statistically significant association between venous dominance and side of aneurysm; and also a statistically significant association between venous dominance and rupture. There was a positive correlation between hypertension and rupture. The most common aneurysm location was the anterior communicating artery, followed by the middle cerebral artery.


CONCLUSIONS
Brain venous drainage dominance may be a predisposing factor for aneurysm formation and it can be predictive for rupture.
Baskent University, Medical Faculty, Konya Research Center, Department of Radiology, Konya, Turkey.
Enes
E
Duman
Ilker
I
Coven
Erkan
E
Yildirim
Cem
C
Yilmaz
H Ulas
HU
Pinar
Ozgur
O
Ozdemir
D000328:Adult; D000368:Aged; D017542:Aneurysm, Ruptured / Q000150:complications / Q000503:physiopathology*; D015901:Angiography, Digital Subtraction; D002550:Cerebral Veins / Q000503:physiopathology*; D004292:Dominance, Cerebral / Q000502:physiology; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000150:complications / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012307:Risk Factors; D014057:Tomography, X-Ray Computed