I have read a lot about the sternum healing process but not much about the heart healing process; Apparently, my aortic valve is the size of my little finger and I will be getting a new one about the size of my big toe. In videos I have watched, the doctors say the heart responds immediately well to the bigger valve. On the other hand, I have heard that it takes time for the heart to adapt to the new valve. I currently have only minor symptoms: carrying heavy items upstairs. Up until December, I was doing full out biking about 10 hours a week. I would expect with a new large valve, my biking performance will dramatically improve.....am I delusional?