A very interesting article on Medscape:
This study shows that having any gum disease doubles the risk of stroke and cardiovascular disease, with a higher risk the more the gums are diseased. But even mild gum disease (which most people have) increases the risk 1.8 times.
The study also shows that regular visits to the dentist (more than once a year) reduces the risk of stroke.
It would seem that the three things AF sufferers should do to help prevent a stroke are:
1, Take an anticogulant
2. Floss their teeth at least once a day
3. Have a 6 monthly dental check up and hygienist visit.