@jam5, that's a really important question to ask your cardiologist. There's a lot of conflicting information about there about green tea, a-fib and blood thinners. Some studies have shown that green tea might reduce the incidence of atrial fibrilation. With some blood thinners, green tea should not be used. Newer blood thinners have fewer dietary restrictions.

You should check with your cardiologist and/or pharmacist.