During phase 2, magnetic resonance imaging (MRI) images of your brain may be taken to look for further damage from the stroke. If you did not seek medical help during the hyperacute (early) phase, doctors will go directly to acute phase therapy and try to determine whether an artery is blocked and, if so, where and why. Intravenous antithrombotic (anticoagulant) medication is often used during phase 2 therapy to prevent further clotting. If you've had an embolic stroke, you may also undergo echocardiography, heart monitoring, and various laboratory tests. These can help the doctor predict your risk of developing a blood clot in the heart.
Thrombolytic medication is not an option during phase 2 because of the risk of hemorrhage. An area of the brain already damaged by a stroke can hemorrhage drastically beyond the area already affected by the clot.