Compared with T1 and T2 groups, T3 group had a higher proportion of hypertension and diabetes in the past, higher admission blood glucose, lower admission serum albumin, lower proportion of middle cerebral artery M1 segment and internal carotid artery at the occluded vessel position, higher mRS score and higher proportion of futile recanalization 3 months after surgery. The gene discussed is ALB; the disease is Hypertension.