Hi Keith, welcome! I'm not sure about the answer to your question. What I would recommend is that if you have any questions that were left unanswered you call your doctor's office and leave a message for him or his nurse.
I think you'll really enjoy this site. There are a lot of nice people on it, who share their experiences.
All the best,
Aortic Valve and Aortic Root Replacement
June 7, 2011