@randy32 You may already have been formally diagnosed for ischemia, but if not, this would be a next step. Also, formally diagnosed for obstructive/central sleep apnea (the best, if you can afford it, is a night spent in a sleep lab where you get hooked up with a gillion leads (you look like a gorgon when they've finished applying them all), and they let you fall asleep in a bed. Some labs make you come back next night and they titrate you for pressure/volume to improve your air flow using a PAP machine. In my case, they awaken you at 0200 and ask you to don a mask and they'll titrate you until waking time at 0600....IF.....they see obvious apnea in the first half of the night.

Endurance athletes often develop AF later in life. I am one such person. But it wasn't my endurance sports, although we both know intuitively, as do physicians, that our 'hobby' probably didn't do us any good as time went on. No, it was those two silent killers, OSA and hypertension, who are kissin' cousins. When you open the closet and see the one, the other has shrunk back into the shadow and is attempting to rearrange clothing....if you know what I mean.

You ask for a treatment plan. Tests for ischemia and sleep apnea come to the fore. And that means a visit to your friendly neighbhourhood cardiologist.