Movie/comic Tony question

[twilight-fang.livejournal.com]

I'm stuck editing the next part to my fic because I'm not sure if I'm referring to the device in Tony's chest properly. In the movie, it's referred to as an arc reactor, but what is it called in the comics? How long has Tony been without it?

I've seen a few older comic covers where Tony is bare chested and doesn't have any sort of device installed/implanted and am now totally confused. @_@

Comments

[tonks07.livejournal.com]

I think Tony must have had some sort of heart surgery between the aftermath of the Sentient Armor and Extremis because in the beginning of Extremis Tony is bare chested.

[twilight-fang.livejournal.com]

Thanks a lot for the information! :D I guess I'm going to have to collect a lot of back issues in order to find out what happened for sure.