Loading...
No population-based data exist on the frequency and prognosis of symptomatic vertebral and basilar artery stenosis. In this study, 538 consecutive patients presenting with TIA or minor stroke in and around Oxford, U.K., underwent imaging to identify stenosis and were followed for 90 days. Investigators compared findings in patients with posterior-circulation ischemic events and ≥50% vertebral or basilar artery stenosis on magnetic resonance angiography with findings in patients with anterior-circulation ischemic events and ≥50% carotid bifurcation stenosis on ultrasound imaging.
Of 141 patients with posterior-circulation events who underwent imaging, 37 (26.2%) had ≥50% vertebral or basilar artery stenosis (23 in the extracranial vertebral a…