Can someone take tramadol if he or she have atrial fibrillation?

Usually yes, but...: Yes , but it can interact with digoxin and with verapamil, which are 2 medicines that some patients that have atrial fibrillation take to slow down their heart.

Yes: But be advised that, if you are taking any of the following which may be used with af, there is an interaction: warfarin (increases the inr), digoxin (increases the dig level), amiodarone (increases the tramadol level), Diltiazem or verapamil (increases the tramadol level), rhythmol (increases the tramadol level), Quinidine (increases the tramadol level).

Yes: Yes, I do not know of any contraindication there.

Should be fine: Tramadol is, generally speaking, say for use in atrial fibrillation, though this is general advice and may not apply to your specific situation.