This is a massive topic in the EM syllabus. Detailed discussions were completed on :

Stroke syndromes – aca amca pca etc, lateral medullary syndrome – anatomy, ct findings, mri and correlation with clinical features

A good resource for this is Harrisons

Acute thrombolysis guidelines and current literature =such as acem policy on acute stroke, – detailed knowledge of the stroke protocol is needed – suggested reading includes UpToDate or stroke review articles

knowledge of HIHSS scoring and modified ranking evaluation is important

Medical management and hypertensive management in stroke situations.