Atorvastatin Pretreatment in Cerebrovascular Events (APICES) After Flow Diverter Implantation

Eligible subjects screened will enter the pretreatment period (at least 24 hours) and be randomly assigned to the trial group (oral atorvastatin) or the control group (placebo) to start receiving the trial drug (20mg, qd). Additionally, the patient was started on basic dual anti-platelet (aspirin 75mg qd + clopidogrel 75mg qd/ticagrelor 45mg bid).