International Multicenter Registry for Mechanical Recanalization Procedures in Acute Stroke

Inclusion Criteria: * Patients being treated with mechanical recanalization devices due to an acute proximal arterial vessel occlusion of brain supplying arteries Exclusion Criteria: * Patients being treated with mechanical recanalization devices for venous vessel occlusion. * Patients being treated with mechanical recanalization devices due to an acute vessel occlusion which occured as a complication of an angiographic procedure scheduled for other reasons (i.e. as a complication of a diagnostic angiography or coiling procedure for cerebral aneurysms)