Abstract：Objective To investigate the prognostic value of magnetic sensitivity weighted imaging (SWI) in patients with acute cerebral infarction with different degrees of microhemorrhage. Methods A total of 110 patients with acute cerebral infarction admitted to the First Affiliated Hospital of Jiangxi Medical College from January 2019 to February 2020 were selected as the research subjects.They were divided into study group(60 cases,cerebral microhemorrhage)and control group (50 cases, simple acute cerebral infarction) according to the presence or not of cerebral microhemorrhage.According to the number of microbleeds in the study group, the patients were divided into mild group (18 cases, 1-5 microbleeds), moderate group (28 cases, 6-14 microbleeds) and severe group (14 cases, ≥15 microbleeds). Intravenous thrombolytic therapy was carried out reasonably in all patients. The hemorrhagic transformation was observed by SWI scan. The national institutes of health stroke scale (NIHSS) scores and the modified rankin scale (MRS) scores were compared in the four groups. Results There was no significant difference in NIHSS scores among 4 groups before treatment (P>0.05). NIHSS scores at 1 and 14 days after treatment in the four groups were lower than those before treatment, and the differences were statistically significant (P<0.05). There was no significant difference in the proportion of the mRS score among the four groups (P<0.05). There was statistically significant difference in the hemorrhagic transfromation in the four groups (P<0.05). Conclusion Patients with acute cerebral infarction accompanied by moderate to severe cerebral microhemorrhage will significantly increase the incidence of hemorrhagic transformation,which will seriously affect the prognosis of patients. The effective application of SWI scanning method can clarify the situation of cerebral microhemorrhage in patients, and provide a strong basis for clinical thrombolytic therapy.
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