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Adult moyamoya after revascularization
1Department of Neurological Surgery, Brigham and Women's Hospital and Harvard Medical School, 75 Francis St, Boston, MA 02115, USA.
Acta Neurochirurgica
|October 31, 2012
Summary
Direct revascularization significantly reduces stroke and hemorrhage events in adults with moyamoya disease. Indirect revascularization shows less clear benefits, suggesting direct bypass is optimal for preventing future events.
Area of Science:
- Neurosurgery
- Vascular Neurology
Background:
- Moyamoya disease is a rare cerebrovascular disorder characterized by progressive stenosis of the internal carotid arteries.
- Cerebral revascularization is a treatment option, but comparative outcomes of direct versus indirect bypass in adults are not well-defined.
Purpose of the Study:
- To evaluate and compare the effectiveness of direct versus indirect cerebral revascularization in reducing subsequent stroke and hemorrhage events in adult moyamoya patients.
Main Methods:
- Retrospective review of 45 adult patients (69 hemispheres) with moyamoya disease undergoing either direct or indirect revascularization.
- Analysis of stroke and hemorrhage rates before and after surgical intervention, excluding perioperative events.
Main Results:
- Direct revascularization led to a significant reduction in annual stroke, hemorrhage, and overall event rates (from 11% to 4.5%), with no events in 41.1 hemisphere-years post-surgery (p=0.0017).
- Indirect revascularization showed a less pronounced decrease in event rates (from 13% to 11%), with a 7.1% annual event rate excluding perioperative complications.
- Patient improvement was higher after direct revascularization (72%) compared to indirect (46%).
Conclusions:
- Direct cerebral revascularization is the preferred method for preventing subsequent ischemic and hemorrhagic events in adult moyamoya patients.
- Indirect revascularization may be suitable for select cases with inadequate donor vessels, but its overall efficacy is less certain.
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