Intracranial Stenosis Management

Introduction to Management

• The American Heart Association/American Stroke Association recommends maintaining blood pressure below 140/90 mmHg for patients with stroke or TIA, with a goal of less than 130/80 mmHg for those with recent stroke or TIA 1
• The American Heart Association/American Stroke Association and the American College of Cardiology recommend a blood pressure goal of less than 140/90 mmHg, and potentially less than 130/80 mmHg for those with recent stroke or TIA, to minimize the risk of cardiovascular events 1, 2, 3

Medical Therapy

• Antihypertensive therapy with agents such as thiazide diuretics, ACE inhibitors, or ARBs is recommended for secondary stroke prevention, with a target blood pressure reduction to <140/90 mmHg 1, 3, 4
• A gradual approach to blood pressure reduction is suggested, with consideration of combination therapy if needed to reach target blood pressure, and monitoring for symptoms of cerebral hypoperfusion 3
• Antiplatelet therapy, such as aspirin 325mg daily, is recommended for patients with intracranial stenosis, and dual antiplatelet therapy with aspirin and clopidogrel for up to 90 days may be considered for symptomatic intracranial stenosis 5, 6
• Aspirin 50-325 mg daily is recommended over warfarin for patients with 50-99% stenosis of major intracranial arteries 2
• High-intensity statin therapy is recommended for patients with vascular disease, regardless of baseline LDL levels, with a target LDL <70 mg/dL 7, 5

Lifestyle Modifications and Risk Factor Control

• Lifestyle modifications, including at least moderate physical activity, smoking cessation, dietary modifications, and diabetes control if applicable, are recommended 7
• Regular blood pressure monitoring, neurological assessment, and carotid imaging are essential for managing patients with high-grade carotid artery stenosis and recent TIA, to prevent further stroke and monitor disease progression 1, 7

Target Values and Monitoring

• The following target values are recommended:

• Regular assessment of medication adherence, serial noninvasive imaging, and monitoring of risk factor control are essential for optimal outcomes 7, 5

Endovascular Intervention

• Endovascular intervention should only be performed at high-volume centers with significant neurovascular expertise, and intracranial stenting is not recommended as initial treatment for symptomatic intracranial stenosis, but may be considered in highly selected cases 6, 5, 8
• For basilar artery occlusions, recent trials demonstrated high rates of intracranial angioplasty and stent placement (55% in BAOCHE) with good outcomes 9
• Evaluation for potential revascularization should be considered if symptoms persist despite medical therapy 10

Timing and Aggressiveness of Management

• Early aggressive medical management is crucial, as the highest risk of recurrent stroke is within the first 30 days after the initial event 11
• Hypertensive episodes can trigger artery-to-artery embolism from unstable plaque in stenotic carotid arteries, posing a significant risk for patients with high-grade carotid stenosis and recent TIA 10