My hand is up...if you're looking. I had my first bout of AF two km from home at the end of a 10 maintenance run. It felt like my legs wanted to give out, and I was short of breath. Knew something was off, but I didn't know what. I sat on the curb for a bit, but my heartrate was high, and it was not really thumping like it would have normally...no lub-dub, lub-dub.

Long story short, two trips to the ER six weeks apart, referral to a cardiologist, MIBI stress test, chest X-rays, echocardiogram, and everything was squeaky clean. This is a 66 year old male, ex-Armed Forces officer, fit, still running, BMI of maybe 26. The only remaining diagnostic was an over night polysomnography. Bingo! Not only apnea, but 'severe' apnea. The cardio shrugged and said, 'Well, I guess we know why you have an irritable heart.' I have been on apnea therapy ever since with a RESMED AS-10 Elite since my apnea is not complex and doesn't need bi-level or adaptive servo functions.

If you are headed in the same direction, please consider spending some time at apneaboard.com. You needn't join or participate, just read some of the more relevant threads for you.