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.