• Norihito Shimamura, Masato Naraoka, Naoya Matsuda, Kosuke Katayama, Kiyohide Kakuta, Takeshi Katagai, Nozomi Fujiwara, Seiko Hasegawa, and Hiroki Ohkuma.
• Department of Neurosurgery, Hirosaki University School of Medicine, Hirosaki, Japan. Electronic address: shimab@hirosaki-u.ac.jp.
• World Neurosurg. 2020 Jan 1; 133: e751-e756.

BackgroundThe most uncontrollable complication during coil embolization of a ruptured cerebral aneurysm is thromboembolic ischemia. We analyzed whether thromboembolic complications could be reduced by using preoperative antiplatelet medications for acute subarachnoid hemorrhage in multicenter fashion.MethodsWe selected antiplatelet medicines according to an official protocol: a combination of 200 mg aspirin, 150 or 300 mg clopidogrel, and 200 mg cilostazol. Systemic heparinization was done after sheath insertion in all cases. One hundred and ten consecutive, ruptured cerebral saccular aneurysms that underwent coiling at our institute were analyzed. Procedure-related thrombus formation on digital subtraction angiography and clinical evidence of ischemia and procedure-related stroke on computed tomography scan were reviewed.ResultsEighty cases (73%) were medicated with multiple antiplatelet medications, 22 cases (20%) were treated with a single medication, and 8 cases (7%) were treated without antiplatelet medication. Thromboembolic complications were reduced in an inverse relationship with the number of antiplatelet medications. Hemorrhagic complications because of antiplatelet medications did not occur. Postoperative symptomatic vasospasm tended to decrease, and outcome also tended to improve in the multiple medications groups. Reduction of thromboembolic complications significantly improved clinical outcome in logistic regression analysis.ConclusionsPreoperative multiple antiplatelet medication reduced thromboembolic events in coiling during acute stage subarachnoid hemorrhage and improved clinical outcomes.Copyright © 2019 Elsevier Inc. All rights reserved.

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