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Vascular geometry change because of endovascular stent placement for anterior communicating artery aneurysms.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Huang, Q-H Wu, Y-F Xu, Y. Hong, B. Zhang, L. Liu, J-M
Description	Country affiliation: China Author Affiliation: Huang QH ( Department of Neurosurgery, Changhai Hospital, Second Military Medical University, Shanghai, China.)
Abstract	BACKGROUND AND PURPOSE: Hemodynamics have been shown to play an important role in the initiation and progress of intracranial aneurysms, and are considered well-related to vascular configuration. The purpose of this study was to quantify the vascular geometry change due to intracranial stent placement and to discuss its potential effects on hemodynamics. MATERIALS AND METHODS: Imaging data of patients with wide-neck AcomA aneurysms, treated with stent-assisted coiling between January 2005 and January 2010, were retrospectively analyzed. The angle between the afferent vessels (A1 segment) and the efferent vessels (ipsilateral or contralateral A2 segment) was calculated to determine the exact change in the angle after stent placement. RESULTS: In all 20 patients, the stent caused a distinct change in the geometry of the parent vessel. Stent-related vascular angle change ranged from 7.60 to 74.88°, with an average of 29.95°. In 10 cases, the angle changed by >30°. In the 12 patients with the distal segment of the stent placed in the ipsilateral A2 segment, the mean postoperative A1-A2 angle increased by 27.71 ± 13.17° (from 7.60° to 48.29°). In the other 8 patients with the distal segment of the stent placed in the contralateral A2 segment, the mean postoperative A1-AcomA-A2 angle increased by 33.29 ± 21.89°(from 15.49° to 74.88°). CONCLUSIONS: In addition to serving as a scaffold to contain coils, stent placement for AcomA aneurysms has a substantial effect on the vascular geometry, which may result in local hemodynamic changes.
File Format	HTM / HTML
ISSN	01956108
e-ISSN	1936959X
Journal	American Journal of Neuroradiology
Issue Number	9
Volume Number	32
Language	English
Publisher	American Journal of Neuroradiology
Publisher Date	2011-10-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Discipline Neurology Discipline Radiology Cerebrovascular Circulation Embolization, Therapeutic Intracranial Aneurysm Therapy Stents Angiography, Digital Subtraction Anterior Cerebral Artery Pathology Physiology Cerebral Angiography Magnetic Resonance Angiography Retrospective Studies Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Radiology, Nuclear Medicine and Imaging Neurology (clinical)

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Vascular geometry change because of endovascular stent placement for anterior communicating artery aneurysms.

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Vascular geometry change because of endovascular stent placement for anterior communicating artery aneurysms.