I so appreciate everyone's contributions on this topic! I have heart palpitations with my BAV and ascending aortic aneurysm as well. They come and go and seem to happen more at night when I'm trying to fall asleep. Maybe it's my mind racing along with my heart! I love my Peloton and try to keep my heart rate under 140 when working out. Before diagnosis, I was easily up in the 150s/160s but have dialed it back. Also do light weights (no more than 15 pounds) vs heavy lifting. Definitely feel a little more winded when going up several flights of stairs (but I've never liked stairs!). We are all on a journey and it's great to have companions who have been there before and are going through it now. Thank you!