Intra-arterial Thrombolysis After Successful Thrombectomy for Acute Ischemic Stroke in the Posterior Circulation (IAT-TOP)

For patients in the successful MT plus intra-arterial alteplase group, after successful recanalization, neurointerventionalists administered intra-arterial thrombolysis with alteplase according to protocol. The angiographic scores will be assessed immediately after intra-arterial thrombolysis.