Welcome to my world. I got AFIB at age 48. Just turned 63. My wife and I both ski, bike, hike, and travel the world. Gym at least 3X a week. I swim around 1200 meters every gym day. My cardi doc says that ablation is now the treatment of choice as opposed to meds. Sounds like your doc is not in the mainstream of thought. But since I have been on meds so long, he thought that as long as they were working, keep on them. The only drug I take is flecainide....100mg 2X day. The max is 150mg. I started on 50mg but after about 4 years, I had my first attack after having been on them. At the hospital, they doubled the dose and converted immediately and have been fine for 3 years now. 3 things. First everyone is different ant reacts differently to any drug. What might work for you, doesn't work for others. 2nd, almost every drug will lose its effectiveness over time so be prepared for that. Last, I believe in supplementing your diet with magnesium (mg). There's several kinds out there. The mg of choice is magnesium oxide. Almost EVERYONE is deficient in that. Your body is a living battery which depends on chemistry to keep the electricity going in your body. Your chemistry hinges on what vitamins and minerals you take. Most diets are lacking in mg so that will impact your chemistry. I have been on it for 3 years. After my last episode of AFIB, I began taking it. Don't know if its the increased dose of flec or the mg, but I have noticed a significant reduction of pacs which I use to feel quite often. Make sure u see an electrophysiologist specialist. Cardio docs specialize in different aspects of the heart, so they're not all the same. Also MOST people get AFIB prior to age 50 contrary to the myth out there that says its an old age problem. Hope u get better.