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Posterior Inferior Cerebellar Artery Patency after Flow-Diverting Stent Treatment
M R Levitt1, M S Park2, F C Albuquerque3
1From the Division of Neurological Surgery (M.R.L., F.C.A., K.M., M.Y.S.K., C.G.M.), Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona.
AJNR. American Journal of Neuroradiology
|October 3, 2015
Summary
Flow-diverting stents used for posterior inferior cerebellar artery (PICA) aneurysms did not cause PICA occlusion immediately or in the medium term. This treatment appears safe for maintaining PICA patency.
Area of Science:
- Endovascular neurosurgery
- Cerebrovascular disease
- Interventional neuroradiology
Background:
- Posterior inferior cerebellar artery (PICA) occlusion rates after flow-diverting stent placement for vertebral and vertebrobasilar artery aneurysms are unknown.
- Assessing PICA patency and occlusion risk factors is crucial for aneurysm treatment safety.
Purpose of the Study:
- To determine the medium-term rate of PICA patency after flow-diverting stent placement.
- To identify risk factors for PICA occlusion following this endovascular procedure.
Main Methods:
- Retrospective review of patients with vertebral or vertebrobasilar artery aneurysms treated with flow-diverting stents across the PICA ostium.
- Recording demographic and procedural factors.
- Evaluating PICA patency immediately post-procedure and on follow-up angiography.
Main Results:
- Thirteen patients were treated; none experienced immediate PICA occlusion.
- No strokes occurred in the treated PICA territory.
- Follow-up angiography in 11 patients at a mean of 10.6 months showed 100% PICA patency.
Conclusions:
- Flow-diverting stent placement across the PICA ostium is not associated with immediate or midterm PICA occlusion.
- This technique may be a safe option for treating vertebral and vertebrobasilar artery aneurysms involving the PICA.
