Learn the Lingo for Stroke Manangement: Patients with acute stroke due to a carotid artery thrombotic lesion that then embolizes to a cerebrovascular artery, have two problems that can be addressed with one coordinated intervention. * "Triple Play" = (1) Carotid artery lesion stenting followed by (2) retrieval of the embolic clot from the cerebrovascular artery via the Merci device followed by (3) intra-arterial tPA (the latter prevents complications that could result from removal of embolic clot). * "Double Play" = (1) Retrieval of the clot from the cerebrovascular artery via the Merci device followed by (2) intra-arterial tPA. Merci Device information: http://www.concentric-medical.com/products_retrieval.html