In reply to ianj: Hi Ian
In 2009 I had my pulmonary valve replaced due to a congenital defect, I knew the op was coming, just not so soon. I had just spent 2 weeks in the alps climbing and felt very strong plus I was running 25 miles per week. Initial post op it was slow progress but I went walking each day and then got enrolled on an nhs rehab course twice per week which covered exercise and relaxation. It started off way to soft and calm for my liking and after being told to get off the running and rowing machines was not what I wanted to hear! I kept up the daily walks and after 2 months of rehab exercise, 3 months post op, i was on the rowing machine and running again. Not too soon after I was climbing again. All in all it was probably 4.5 months post op until I was 100%.
All I can say is take things steady and gradually build up the intensity, the nhs rehab course helped me tremendously, so I would ask your consultant or gp if one exists and go and do it! If not I would go and a very low key aerobic class etc but make sure you let the leader know where you've been.
Hope that helps
Davey