Basilar Artery Stenosis Correlation - And Posterior Circulation Infarction

Objective To investigate the correlation between the distribution of lesions on MRI and the findings of computerized tomography angiography (CTA) in patients with posterior circulation infarction.Methods Patients with acute posterior circulation infarction were enrolled in the study. The sites of the infarcts were divided into proximal, middle and distal infarctions according to the results of MRL All the patients received head and neck CTA. The correlation between the distribution of posterior circulation infarcts and the sites of vertebrobasilar system lesions was analyzed.Results A total of203patients with acute poste-rior circulation infarction were enrolled. Their primary clinical symptoms and signs were unilateral limb weakness (n=77,37.93%), dizziness (n=129,63.55%), dysarthria (n=31,15.27%), nausea and vomi-ting (=61,30.05%), headache (n=79,38.92%), gait abnormal (n=50,24.63%), nystagmus (n=34,16.75%), and ataxia (n=21,10.34%). Proximal infarction (n=35,17.24%):medullary infarction (n=28,13.79%), posterior inferior cerebellar artery infarction (n=7,3.45%);middle infarction (n=95,46.79%):pontine infarction (n=80,39.4%), anterior inferior cerebellar infarction (n=15,7.39%); distal infarction (n=73,35.96%):middle cerebral infarction (n=6,2.96%), superior cerebellar infarction (n=16,7.88%thalamic infarction (n=34,(16.75%), occipital lobe infarction (n=10,4.93%), temporal lobe infarction (n=7,3.44%). Extracranial vertebral artery lesions were most common in the distal infarction group. It reached53.42%, and was significantly higher than22.86%in the proximal infarction group (P=0.003) and33.68%in the middle infarction group (P=0.010). Intracranial vertebral artery lesions were most com-mon in the proximal infarction group. It reached57.14%, and then followed by the middle infarction (41.05%). They were all significantly higher than15.07%in the distal infarction group (all P=0.000). Basilar artery lesions were most common in the middle infarction group. It reached20.00%and was signifi-cantly higher than4.11%in the distal infarction group (P=0.002). Posterior cerebral artery lesions were most common in the distal infarction group. It reached27.40%and was significantly higher than5.71%in the proximal infarction group (P=0.009) and5.26%in the middle infarction group (P=0.000).Conclusions The range of vascular lesions of the distribution of lesions shown on MRI and the findings of CTA on vertebrobasilar artery system in patients with posterior circulation infarction had some connection. During the proximal and middle infarctions, the possibility of having intracranial vertebral artery lesions was greater; during the distal infarction, the possibility of having extracranial vertebral artery and posterior cere-bral artery lesions was greater.