Đánh giá một số bất thường giải phẫu đa giác Willis và mối liên quan với tuần hoàn bàng hệ ở bệnh nhân nhồi máu não cấp

Abstract

Objective: To evaluate the anomalies of the circle of Willis and its relationship with collateral status in patients with acute ischemic stroke. Subject and method: 136 patients with AIS who received 3-phase CTA in the first 7 days from onset, treated according to routine protocol at Stroke Department, Military Hospital 103 since November, 2021 to July, 2022. To evaluate common risk factors for ischemic stroke and some clinical characteristics at admission; the degree of CS on 3-phase, 64-slide CT angiograpy according to the Calgary scale and the abnormalities of the circle of Willis; determine the relationship between the degree of CS with the clinical characteristics and abnormalities of the circle of Willis. Result: Abnormalities of the circle of Willis were found in 57.4% of patients. In which, the most common was bilateral Pcom hypoplasia with 16.2%, followed by unilateral Pcom hypoplasia with 13.2%. The rate of good CS was highest in the group without Willis circle abnormality and gradually decreased according to the groups of unilateral Pcom hypoplasia, bilateral Pcom hypoplasia, unilateral Pcom aplasia and bilateral Pcom aplasia (94.8%, 83.3%, 68.2%, 58.8% and 50%). Conclusion: Abnormalities of the Willis circle were found in 57.4% of patients. The rate of good CS was highest in the group without Willis circle abnormality and decreased in the groups with hypoplasia, aplasia.