I remember it when my grandmother was attacked by high blood and it leads to stroke also. She was brought to ICU where she was in comma. It seems that high blood can result into stoke also.

    

High blood pressure or hypertension is one of the major causes of stoke. Once your heart pumps more blood than usual, hence high blood pressure, some veins to the brain cannot handle the sudden burst of blooding flowing so they tend to explode inside the nape of the head and blood will definitely flood the brain. This is stroke.

Low blood pressure, on the other hand, as far as I know, will not lead to stoke. Because the heart pumps less amount of blood.