So as a newcomer, Doc, did you find the damaged heart scenes made sense? I understood why they were in there since I have read the origin and early comics (reprints, I ain't that old) but if I hadn't, I would have thought they were kind of...unnecessary. Well, I kind of felt that way anyways since it was never mentioned again for the rest of the movie.
Well, I knew from reading about Iron Man online that the damage to his heart was part of his origins, so it made sense to me to have those scenes there. I can see, though, how they'd be confusing to someone completely unfamiliar ... they wouldn't understand how that related to his inventing the iron suits.