There were no significant differences in good prognosis group with poor prognosis in gender, smoking history, drinking history, diabetes, hypertension, cerebral infarction, coronary heart disease, surgical procedure, aneurysm location, monocyte, procalcitonin, hematocrit, red blood cell distribution width, average blood platelet volume, platelet count, large platelet volume, total cholesterol, triglyceride, high density lipoprotein, low density lipoprotein, apolipoprotein A1, apolipoprotein B100, fibrinogen and albumin levels (P > 0.05). This evidence concerns the gene APOA1 and brain infarction.