Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the treatments for Atrial Fibrillation and Stroke ?
    ### Response:
    Within a few hours after onset of a stroke, treatment with drugs or devices that dissolve or break up the clot can restore blood flow to the brain and lead to a better recovery. To prevent strokes related to AF, doctors often prescribe medications to prevent formation of clots in the heart, which can travel to the brain and cause stroke.
    