Hello. Sorry about your recent developments. About all I can say is that the weight you are carrying 'could be' the progenitor of your heart's woes. Unfortunately, as we age, we often do poorly with sleep, and that's a recipe for weight gain due to increased blood cortisol and insulin overuse. With that weight gain, we deposit more visceral fat than normally, or at least than in years long past, and some of that gets deposited around the heart. It can make the heart cranky. Your 'pipes' are clean, apparently? An angiogram or echo showed no stenoses? No mitral valve prolapse? Ejection fraction is nominal?

It is quite common for people to present to an ER with an arrythmia, at which, with tests confirming nothing else untoward, no electrolyte deficiencies or overabundances, etc, they'll offer to cardiovert. Often, that works well, first shock, and the patient is soon on his/her way back home. Unfortunately for me, none of the four I had worked for more than a few hours. Soon I was back in AF, but it's another long story. Happy to say that I am now in NSR after other interventions.

Please do consider losing at least 15 pounds. It can't help but do you some good, and may reduce deposits that are making your heart cranky. It's an idea, just a suggestion from a layman. If you could stand a pointed suggestion, please do consider reducing your carbohydrate consumption, of all kinds, all food and drink, to less than 150 grams per day, even lower if it isn't too much of a bother for you. This will keep your insulin response to a minimum, which means less storage of unused calories.