My maternal grandmother had a minor stroke last week. She had 80% blockage in her carodid artery.
She's otherwise fine... She'll need to go into surgery to remove the clotting, or have a 40% risk of a second.
She made it clear that, should it get to that point, we should not keep her on life support.
My grandmother's a tough woman. I won't even worry about it until something worse comes around.
Which it will. Time will get us all.