I'm af , my ef 60%, i haven't heart attact, no symtomps, no angina& haven't stenting. after cabg & laa ligation, need anticoagulant or antiplatelet?

Antiplatelets: Usually anti-platelets are the stand treatment to prevent a further heart attack in the setting of a known coronary artery disease and post CABG. Anticoagulants could be used in such instances like atrial fibrillation or history of DVT or PE. Left atrial appendage exclusion reduce but does not eliminate the risk of strokes from atrial fibrillation therefore often times anticoagulants are continued

Depends: if having paroxysmal (that is intermittent) atrial fib interspersed with periods of normal rhythm, and if no history of hypertension/stroke/diabetes then I think aspirin is sufficient. If rhythm persistently afib or if any of those illnesses mentioned above are present, then you will likely benefit from warfarin or one of the newer agents.