Below is an instruction from Human. Write a response.
    ### Instruction:
    Who is at risk for Atrial Fibrillation? ?
    ### Response:
    Atrial fibrillation (AF) affects millions of people, and the number is rising. Men are more likely than women to have the condition. In the United States, AF is more common among Whites than African Americans or Hispanic Americans.
                
The risk of AF increases as you age.
    