When analyzing multivariate factors of patients to mortality after 3 months, there were 2 factors: Glasgow score < 8 (OR= 2.9; 95% CI: 1.4 - 3.9; p=0.01) and poor collateral flow on CTA (OR=4.2; 95% CI: 1.6 - 3.1; p<0.05) were independent predictors of mortality at 3 months.