Use of Imaging to Select Patients for Late Window Endovascular Therapy

Gregory W. Albers, MD


Stroke. 2018;49(9):2256-2260. 

In This Article

MRI Findings in Persistent Occlusion

In patients with large artery occlusion who do not experience recanalization, the DWI lesion typically expands into much or all of the persistent Tmax >6 seconds perfusion lesion.[8–10] However, late window patients, who are selected based on having salvageable tissue, typically have good collaterals, and the final infarct volume may not be obtained for several days.[13] Therefore, a follow-up scan at 24 hours will often underestimate infarct volume in patients who have a persistent occlusion.