Đặc điểm tổn thương nhu mô não và tuần hoàn bàng hệ trên CTA 3 pha ở bệnh nhân tắc động mạch não lớn

To evaluate the characteristics of brain parenchymal damage and collateral circulation on 3-phase CTA in patients with large cerebral artery occlusion. Subjects and research methods: prospective, cross-sectional study, 94 patients with large cerebral artery occlusion in the first 7 days, treated at the Stroke Department, 103 Military Hospital, from September 2021 to May 4 in 2023. Results: The rate of occlusion of the middle cerebral artery (M1,2) is 53%, the internal carotid artery (ICA) is 26%, the M1,2 and the ICA is 17%; The basilar artery (BA) is 4%. 55.3% had no lesion image on CT scan: 13.8% had large density loss ≥ 30ml. The group with CT scan ≤ 6 hours had ASPECTS score ≥7 accounted for 93.8%; 65.4% higher than the group with CT scan > 6 hours with p < 0.05. The rate of good collateral status on 3-phase CTA according to the location of the occlusion was highest in the group of simple ICA occlusion with 29.2%; the lowest is BA occlusion with 0%; p>0.05. Conclusion: M1 occlusion was common 53%, 55.3% had no lesion image on CT scan, ASPECTS score ≥7 in the group who went to hospital before 6 hours accounted for a higher rate than those who went to hospital after 6 o'clock. The collateral circulation due to good ICA occlusion accounted for the highest rate of 29.2%.