My partner has had AF for thirty years and my mum for ten years. They are both on blood thinners and beta blockers. As I think others have pointed out, the main fear is not a heart attack, it’s a blood clot, which can cause stroke - hence the blood thinners. If you take your meds as prescribed you should be fine. I would also like to make a point regarding blood thinners. The modern ones like Edoxiban and Apixaban don’t require monitoring, unlike Warfarin, for which regular INR monitoring blood tests are necessary. However, should there be a bleeding episode, there is no antidote to the newer drugs, whereas the effects of Warfarin can be reversed with Vitamin K under medical supervision. I have experienced the effects of both - my mum was taking Apixaban and had to be admitted to hospital for treatment and monitoring after a rectal bleed caused by the drug. My partner, who takes Warfarin, had a bleed after an antibiotic reacted with Warfarin and caused a haemorrhage. After an infusion of Vitamin K at A&E, he was fine. My partner has taken Warfarin for years, and was offered a switch to one of the newer drugs but refused after the possible consequences were explained to him. I’m not wishing to be alarmist, because I don’t think these occurrences are commonplace - just wanted to make people aware if they weren’t already.