I have Afib occasionally and after side effects from the drug, Amiodarone, my thyroid was damaged. I was prescribed levothyroxine and after 4 months heart palpitations started. I purchased a smart watch by VeryFit. It's around $80.00 on Amazon and it is very helpful. I think it is worth having the watch and if you are in Afib I have to say that it helped me go back to a regular sinus rhythm since I was watching my BPM and breathing and I seemed to get back into rhythm in less time. Although you can perform box breathing and deep breathing exercises for Afib (if not chronic) you can tell the difference if you are having palpitations or Afib which will progress into much higher heart rates and low heart rates by the BPM on the watch. My palpitations are a side effect of levothyroxine so they happen randomly with no trigger, but if I feel a symptom coming, the watch shows the elevated heart rate at rest. I then start breathing before it gets worse. When in Afib 2 months ago, I knew it was Afib by the heart rates and I focused on my watch for signs of slowing BPM which helps. The watch connects to your phone through an app so you can see your heart rate on the phone as well and it has great features for exercise, stress rates, calories, and many other features. It is also waterproof so I swim with it and it gives me the distance while swimming in meters. It has a feature for BP but is inaccurate. But, I think that is the only negative.