Every branch below is built from the 2026 AHA/ASA acute ischemic stroke guideline, CSBPR 2022 and its 2025 EVT update, and the Thrombosis Canada guide. Each recommendation cites the verbatim source text with its page and grade. Missing information is never read as a "no": the tree stops and asks for it.
Where the guidelines differ in threshold, strength or approach. The outcome's grade follows its first (basis) citation, usually AHA 2026; the Canadian position is stated alongside.