Atrial Fibrillation is a very inexact science. There are also many variations of AF from Paroxysmal to Permanent. Some of us who have it wake up each morning as though we have run an overnight marathon. Main thing is to avoid the possibility of a stroke or haemorrhage which is a major AF effect.
I would seek very well sourced advice.
Check out this link.
If you are UK based.....
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Good luck