I am trying to find out the why's and wherefor's of my new condition. I am post CABG x4 4years ago. I have been training quite hard at F45 and am a good weight with well controlled BP and a mild drinker. Yesterday the cardiologist informed me that I had a severely enlarged L atrium. Upped my BP meds and said see me in 3 years! So I am a little panicked about this enlargement and what it means. I notice that all references I check lead me to AF which I don't have ...yet. Any advice or leads to more information would be very much appreciated.