Abstract: Objective：To investigate the correlation between delayed cerebral infarction with intracranial aortic and small arterial spasm in subarachnoid hemorrhage.Methods：170 SAH patients admitted to the Department of Neurological Surgery of our hospital from January 2014 to October 2019 were analyzed.DCI was divided into DCI group and DCIfree group according to whether DCI occurred during hospitalization.General data,CT perfusion imaging(CTP) parameters,CT angiography(CTA) and Transcranial Doppler(TCD) were compared between the two groups,multivariate Logistic regression was used to analyze the relationship between intracranial artery spasm in different regions and DCI after SAH.Results：Of the 154 patients included in the study,61 had DCI,with a DCI incidence of 39.61%.The incidence of cerebral blood volume (CBV), cerebral blood volume (cerebral blood volume，CBV) and intracranial artery spasm in DCI group were higher than those in DCIfree group(P<0.05).Fewer patients underwent lumbar puncture CSF replacement in the DCI group than in the DCIfree group(P<0.05).The cerebral blood flow (CBF) in DCI group was lower than that in DCIfree group(P<0.05).Multivariate Logistic regression analysis showed that,Fisher's grade CBV and macrovasosm were independent risk factors for DCI after SAH,CBF was a protective factor affecting DCI of patients after SAH.Conclusion：Intracranial arterial spasm is an independent risk factor for patients with DCI after SAH,while spasm of small arterial has no significant correlation with DCI after SAH.

Key words: subarachnoid hemorrhage, delayed cerebral infarction, intracranial artery spasm, CT perfusion imaging