I am right at 12 weeks out from Aortic Valve replacement. I am still having an issue with a popping feeling in my lower left side of my sternum. my cardiologist actually felt what I was talking about. he said not much we can do but I should talk to my surgeon and I will Monday coming. it feels like only the last inch or two on the left is not joined. has anyone else had this issue and how did it take care of itself.