All,
Still, keep an eye on the maximum HR you are running when working out, and if it gets too high (approximately 220 - age, is too high even if young). If your HR gets too high, slow down... that's how I see it, and my cardiologist agrees for my permanent AFib condition.
I have both and take beta blockers. I exercise probably 5 or 6 days a week. I do cardio workouts, strength training, free weights and yoga. I don't guess I qualify as an athlete but I do pretty good workouts. At first I was terrified when my heart rate went up and I must admit that there are still times it kinda bothers me. But I'm trying really hard not to let this control my life.