TOAST Classification

**Semantic type:** Classification

**Definition:** A classification of subtypes of ischemic stroke based on clinical features and the results of ancillary diagnostic studies.The TOAST classification denotes five subtypes of ischemic stroke: 1) large-artery atherosclerosis, 2) cardioembolism, 3) small-vessel occlusion, 4) stroke of other determined etiology, and 5) stroke of undetermined etiology.

**Synonyms:** - Ischemic Stroke Subtype Classification - TOAST - Trial of ORG 10172 in Acute Stroke Treatment Classification