Glad to hear that you are doing better. I can only imagine how shocked you were to have to go through all of that at a relatively young age. You see, I am 43 and suffered a minor heart attack last February myself. Luckily for me, there was no blockage or damage detected when they sent me for the angiogram (there was some plaque buildup along the arteries though), so I was released after a few days in the hospital of them monitoring me and put on cholesterol pills, blood pressure pills, and a baby aspirin a day. Although my blood pressure was through the roof and my cholesterol not good at all at the time of the attack, I was told that a piece of plaque most likely broke free and caused a temporary blockage, and therefore, was lucky it wasn't too serious.
It's funny...I was actually just sitting here on these forums this evening/morning thinking about the same exact thing when I stumbled upon your post. I haven't rode TOT since our first trip, and have only rode RnRC twice in 4 trips. I tend to love RnRC after I get off of it, but not so much leading up to it, and usually get anxious and butterflies the whole day before going on it and a few of the other rides also. Since I was fortunate enough to escape my little health scare with no major damage to my ticker, I've looked at the whole experience as a wake-up call (heart disease runs in my family BIG TIME) and have changed my lifestyle and diet and everything else around me for the better and can't see why I would want to put unneeded anxiety and stress on myself while on a relaxing vacation. So I've told my wife that she is welcome to go on whatever she wants next April when we head back down to the World, but I may skip a few of the rides if I don't feel comfortable or are nervous about going on them. There are plenty of other things I can do instead.