Contralateral Approach to Coil Embolization of Proximal A1 Aneurysms Using the Anterior Communicating Artery.

Due to angio-anatomic constraints, a contralateral strategy for coil embolization of proximal A1 aneurysms is acceptable if ipsilateral access is technically prohibitive and the vessels (contralateral A1 and anterior communicating artery) are amenable to the passage of microdevices.