i don't think they shaved my chest at all (BAVR surgery)...looking at my 3 week post-op scar that Jefff posted for me under the forum "The order of the Tawdry Shirt (Toots)", maybe I wasn't considered "hairy" enough...must depend on surgeon's preference. IMHO, I think it is best left in their hands to what they want to shave or not shave...
Scott
Scott