Hi all. I had an aortic valve replacement and ascending aortic aneurysm repair in December 2019. I went with an On-X mechanical valve and have been very happy with the choice. This past March I started to notice some occasionally palpitations or missed beats. Normal I would notice it if I woke up at night or lying in bed early in the morning. They lasted on and off for 6 weeks or so and then disappeared. During post-surgery cardiac rehab the nurse noticed an occasional premature ventricular contraction and said these are pretty normal. I am wondering if these palpitations were premature ventricular contractions? Also, they started shortly after I completed a 50 km cross country ski marathon. Anybody have palpitations and/or premature ventricular contractions after strenuous exercise? Thank you. (I do plan on speaking to my cardiologist about this at my next check-up).