Hi
this does not directly address your question, however I more or less have taken care of my own rehab. Certainly 20 years ago when I had my 2nd valve surgery no such thing existed. That I got 20 years from a cryo-preserved tissue homograph (a valve from another human) is at least some sort of indicator that I did ok at my rehab.
What I did was (perhaps obvious) to undertake daily 20 min exersize such as walking. I then took that up to cycling after several months. I increased my exersize times from 20 min to 45 min at a schedule which basically added a few minutes to my routine every week.
I was fastidious to follow the same routes so that I could also know how I was doing on known terrain (like say this small hill here or that stairs there). I used a heart rate monitor and kept my heart rate between 120 at the bottom end (which wasn't hard at first) and no more than 145 at the upper end.
I paid attention to my body and how I was feeling (laboured breat, heart ponding ...) as well as the data (from the monitor). There are some really nifty HR monitors now with GPS data capture and you can load that into your PC and check things in detail. Record keeping (I used a book) is important because you can SEE how you are doing and when you 'miss'. If you miss your exersize you MUST write down why in the comments.
By 2 years I was cycling 20Km (mixed flat and hilly) 3 nights a week in 45 min.
I ate sensibly, minimal alcohol, decent carb balance, decent fatty content (I despise margarine with a passion {due to links with cardiovascular disease}, so its natural fats such as butter, olive oil or macadamia nut oil). Protiens most nights a week (say 100g or so of chicken / fish / beef in a curry or stew or even a roast) and a good spread of vegetables.
totally ZERO 'TV dinner' premade meals or highly processed foods.
seems to have worked for me.
The important point is do not over do it, small steps forwards, no steps backards (by over doing it) ... pick your pace (identify your limits by the heart rates and stuff) and don't push too hard. Equally don't slack off either.