TOAST classification in acute ischemic stroke

Last revised by Rohit Sharma on 8 Feb 2024

The TOAST (Trial of ORG 10172 in Acute Stroke Treatment) classification denotes five etiologies of ischemic stroke.

  • large-artery atherosclerosis

  • cardioembolism

  • small-vessel occlusion (lacune)

  • stroke of other determined etiology

  • stroke of undetermined etiology

It is thought to carry good interobserver agreement 2.

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