Thromboembolic complications during endovascular treatment of ruptured cerebral aneurysms

BackgroundIn cases of subarachnoid hemorrhage due to aneurysm rupture, the administration of an anticoagulant or antiplatelet agent involves the risk of rebleeding from the aneurysm. There is a possibility of inducing thromboembolic events during the endovascular embolization of ruptured cerebral aneurysms.Patients and methodsFrom April 2006 to March 2017, we treated a total of 70 patients with ruptured cerebral aneurysms with an endovascular technique. Among them, five patients (7.1%) showed intra-arterial thrombus formation. The aneurysms were located at the anterior communicating artery and basilar artery in two patients each, and on the internal carotid artery at the bifurcation of the anterior choroidal artery (AChoA) in one. In these patients, the clinical course, radiological findings, and management were retrospectively reviewed.ResultsThrombus formation was observed in the posterior cerebral artery, anterior cerebral artery (A2), AChoA, and middle cerebral artery. The timing of thrombus formation...