I run or do some form of aerobic activity 3-4 times a week. My resting heart rate is between 45-55. Most all of the A-Fib events happen while at rest or sleeping, and range from a few minutes to two to three hours. Thank you for your review. Dear Alan, Vagal mediated afib is a well described phenomenon and often occurs in older athletes.
Hypertension is also a potential and more common cause of afib.
As far as drug treatment there are many different options and would have to be customized to the particular situation. Blood thinners are often prescribed to reduce the risk of blood clots. Aspirin does not have any benefit in reducing clots although it does have other benefits for the heart. Pacemakers are sometimes used for vagal-mediated afib as well. I have enclosed some general information of afib below.