RESUMEN
Objective To investigate the safety of treatment of symptomatic middle cerebral artery stenosis with Gateway-Wingspan system by reviewing the data on complications.Methods Forty-seven patients with symptomatic middle cerebral artery stenosis treated with Wingspan system were respectively analyzed and emphasis was paid to cases with complications.Relevant data was collected such as characteristics of patients and lesions,selection of ballon and stent and radiographic information.Results Complications were found in 4 patients (8.5％),which were due to cerebral vasospasm,heperperfution syndrome,artery branch rupture and subacute stent thrombosis respectively.Two patients experienced symptomatic intracranial hemorrhage (4.3％)and one of them died (2.1％).The morbidity of severe complications was 6.4％.The success rate of stent implantation was 100％.Mean artery stenosis reduced from (83.5 ± 10.0)％ to (19.8 ± 9.2)％ after Wingspan stent implantation.Conclusion Middle cerebral artery stenting angioplsty greatly improved the stenosis with high technical success rate.However,the rates of cerebral vascular complications and symptomatic intracranial hemorrhage were relatively high in this study,which needs to be widely verified in practice.