After cabg with ligation laa, is it still need anticoagulant? better use warfarin or rivaroxaban? i'm af

Atrial fibrillation: Anticoagulation is used to lower risk of stroke in those w/atrial fibrillation (it's also used post-operatively to lower risk of blood clots). There are advantages & disadvantages to warfarin vs newer oral anticoagulants such as rivaroxaban. Final decision depends upon patient, such as nutrition habits, ability to get testing, cost, etc. If you're already taking Pradaxa, you don't need either.