Abstract: This study investigated the relationship between cerebral microbleeds (CMBs) and asymmetric cortical vein sign (ACVS) detected by susceptibility-weighted imaging (SWI) and the prognosis of patients with acute cerebral infarction (ACI). A total of 87 patients diagnosed with ACI and receiving intravenous thrombolysis were selected as the research subjects. All subjects underwent SWI scanning. According to the modified Rankin scale (mRS), the patients were divided into good prognosis (58 cases in the good group), poor prognosis (29 cases in the poor group) two groups. The detection rates of CMBs and ACVS were compared between the two groups, and the receiver operating characteristic (ROC) curve method was used to explore the prediction of the two indicators in the prognosis of patients after ACI intravenous thrombolysis. aspects of the role. The results showed that the detection rate of CMBs and ACVS in the good group was significantly lower than that in the poor group (P<0.05). Logistic model results showed that higher baseline NIHSS score, higher NIHSS score at 24 h of thrombolysis, combined hypertension, severe middle cerebral artery stenosis, CMBs, and ACVS were independent risk factors for poor prognosis in ACI patients (P<0.05). Decreased ASPECTS infarct area score was an independent risk factor for poor prognosis in ACI patients (P<0.05). SWI can early detect the characteristics of CMBs and ACVS after intravenous thrombolysis in ACI patients, and can evaluate the risk of poor prognosis of patients.

Key words: magnetic resonance, susceptibility weighted imaging, cerebral microhemorrhage, asymmetric cortical venous sign, acute cerebral infarction, prognosis