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From 2000 to 2002, coil embolization was selected as the first-choice treatment for ruptured aneurysms. Of 180 patients, 119 (66%) were treated by coil embolization and 61 (34%) by clipping surgery. In particular, in the vertebrobasilar and anterior cerebral arteries, almost 90% of the aneurysms could be treated by coil embolization. Abbreviations, refer to table 1.
