hi -- i am in the US,69 yrs old, female, and have a-fib and high blood pressure. i'm advised to start taking an anti-coagulant but i had stomach surgery (gastric bypass) in 1998. There is an issue with absorption of some medications and nutrients. Need to know if anyone on the forum with a-fib has had stomach surgery and what are they taking for stroke risk reduction? My cardio recommends warfarin, i want to take eliquis. thanks for any response!