The chest shave is a good idea. For some reason I can't fathom, they may also have you wash your whole front with that reddish-orange-brown soap after they have the IV in the back of your hand. Plainly a two-handed job, but winds up being a stand-in-front-of-the-sink, unwieldy, one-handed sponge bath thing, with dripping everywhere.
As far as the rest of the body, the thing that has surprised me most about it from the descriptions in posts is the fact that it's shockingly different in different hospitals.
Some do the whole pubic shave for the cath, although it isn't close enough to cause a problem for most people. For me, they just asked me to trim the edge and the longer hairs that could fall to that side, then a couple of quick swipes with the razor in the actual incision area. "Tighty-Whities" do a yeoman's job of keeping everything else out of play. One less area to itch aggravatingly for a week. Why do so many hospitals not consider their patients' comfort in these small things that are under their control?
If you're going to be on a helper pump to "rest" your heart before surgery, there may be more shaving requirements there. Except for those with problem hearts, I find this a disturbing and unnecessarily damaging trend in some hospitals, as the unit is left in the artery overnight.
There is some nausea after the surgery, at least insofar as eating is concerned. Nothing tastes right. However, the consensus seems to be that it's left over from the main anesthesia, which can take weeks to work out of your system.
Personally, I think that requesting patient-controlled Fentanyl for post-operative pain makes sense for most, rather than just going with the typical morphine. It's a close relative of morphine, but less of a soporific (sleep inducer), and has reduced occurrence of nausea, mental confusion, and constipation (morphine's ability to cause this is legendary). I had it, and it handled the pain with no problem, and it left me mentally sharp and competent to torment the hospital staff.
One more thing...ask if they use a lip clip to hold the breathing tube. If they do, ask if they'll tape yours instead. The lip clip left me with a sore, swollen lip for two days. Completely unnecessary discomfort.
Best wishes,