I am a very healthy, active 84years old who had aortic valve replacement 9 months ago. The only meds I am taking are a baby asa and Zoloft. I am weak and shaky in my legs and can't seem to get my energy back to where it was before surgery. I spent 3 weeks in the hospital after surgery because I had a hard time coming out of the anesthesia. I can't drive yet. Have you ever heard of this kind of recovery? And will I ever regain the strength I had before surgery?