Overview
Stenosis of the vertebral foramen, particularly involving the vertebral artery, can lead to vertebrobasilar insufficiency, causing symptoms ranging from transient ischemic attacks to more severe strokes. Treatment decisions vary between symptomatic and asymptomatic cases 1.Diagnosis
Key Diagnostic Criteria: >50% stenosis identified via imaging (e.g., MR angiography, CT angiography) 1.
Recommended Tests: Angiography (CTA, MRA) to confirm the degree and location of stenosis 1.
Grading: Utilize the North American Symptomatic Carotid Endarterectomy Trial (NASCET) grading system for assessing stenosis severity 1.Management
First-Line Treatments:
- Endovascular Procedures: Angioplasty and stenting for symptomatic stenosis 1.
- Medical Management: Antiplatelet therapy (e.g., aspirin, clopidogrel) for secondary prevention 1.
Adjunctive Treatments:
- Monitoring for Complications: Regular follow-up to detect hyperperfusion syndrome, stroke, or stent-related issues 12.
- Addressing Comorbidities: Management of high-risk cardioembolic sources 1.Special Populations
Elderly: Increased risk of complications such as hyperperfusion syndrome and vertebrobasilar stroke 12.
Comorbidities: Patients with severe anterior circulation lesions may benefit from additional cerebral blood supply through vertebral artery intervention 1.Key Recommendations
Consider endovascular treatment (angioplasty and stenting) for symptomatic vertebral artery stenosis with >50% stenosis to improve neurological outcomes (Evidence: Moderate 1).
Evaluate asymptomatic patients with severe vertebral artery stenosis cautiously, considering potential benefits against risks, especially in those with significant anterior circulation disease (Evidence: Weak 1).
Monitor patients post-stenting closely for signs of hyperperfusion syndrome and cerebrovascular events, including bilateral thalamic hemorrhages (Evidence: Expert opinion 2).References
1 Parkhutik V, Lago A, Tembl JI, Aparici F, Vazquez V, Mainar E. Angioplasty and stenting of symptomatic and asymptomatic vertebral artery stenosis: to treat or not to treat. European journal of neurology 2010. link
2 Rezende MT, Spelle L, Mounayer C, Piotin M, Abud DG, Moret J. Hyperperfusion syndrome after stenting for intracranial vertebral stenosis. Stroke 2006. link