PT - JOURNAL ARTICLE AU - Nicholas J. Patronas AU - William J. Marx AU - Eugene E. Duda AU - John J. Mullan TI - Microvascular Embolization of Arteriovenous Malformations: Predicting Success by Cerebral Angiography DP - 1980 Sep 01 TA - American Journal of Neuroradiology PG - 459--462 VI - 1 IP - 5 4099 - http://www.ajnr.org/content/1/5/459.short 4100 - http://www.ajnr.org/content/1/5/459.full SO - Am. J. Neuroradiol.1980 Sep 01; 1 AB - A retrospective and prospective analysis of cerebral arteriograms in 28 patients with intracerebral arteriovenous malformation (AVM) was undertaken to identify those parameters that predict the efficacy of small silicone particle embolization as a method of treatment. It was noted that when the number and caliber of the arterial feeding vessels were greater than the number and caliber of the draining veins the embolization was successful (15 of 16 patients). On the contrary, when the number and caliber of the draining veins exceeded that of the arteries the embolization failed (seven of seven patients). In four of five patients with nearly equal ratios, the embolization reduced the flow but not the size of the malformation.