Stent Implantation Versus Balloon Dilation for Acute Anterior Circulation Tandem Occlusion

Inclusion criteria

• ✓. Age 18-85 years old;
• ✓. Acute ischemic stroke and the onset time within 24h;
• ✓. Pre-stroke mRS 0-1;
• ✓. NIHSS score of 6-30 before randomization;
• ✓. Completed randomization within 24h after stroke onset；
• ✓. Subjects are able to sign an informed consent in person or by the legal representative
• ✓. Satisfy one of the following criteria:①Within 6 hours of onset, imaging confirmed occlusion of the acute anterior circulation internal carotid artery or the M1 / M2 segment of the middle cerebral artery；②Within 6-16 hours of onset, imaging confirmed acute occlusion of anterior circulation internal carotid artery or M1 / M2 segment of middle cerebral artery followed by DAWN or DEFUSE-3 criteria；③In patients with 16 to 24 hours of onset, imaging confirmed intracranial occlusion of the acute anterior circulation internal carotid artery or M1 / M2 segment of the middle cerebral artery followed by DAWN criteria.
• ✓. Extracranial segment stenosis ≥70% or occlusion in tandem lesions.

Exclusion criteria