New Stent Retriever, VERSI System for AIS

Efficacy and Safety of VERSI System for Acute Ischemic Stroke

To confirm efficacy and safety of VERSI system for acute ischemic stroke

Efficacy; TICI 2a or more recanalization upto 3 pass of study device Safety; symptomatic intracranial hemorrhage within 24 hours of procedure

Inclusion Criteria:

• onset to treat within 8 hours
• NIHSS 8 or more
• ASPECTS 5 or more
• Target vessel is ICA, MCA, VA, BA, PCA
• non-eligible or failed IV rt-PA

Exclusion Criteria:

• known hemorrhagic tendency
• arterial dissection, vasculitis
• allergy for contrast media
• other inappropriate condition