GHERU wrote:yea, but didn't she have a fake heart during that?
this is from the wiki entry about catwoman, for that storyline (Heart of Hush)
In Detective Comics #848 (November 2008), Hush attacks Selina as she is in her apartment, kidnapping her and surgically removing her heart. She is delivered anonymously to a Gotham hospital. Batman receives word of her situation, and while he goes in search of Hush, he leaves Selina in the care of Doctor Mid-Nite, who is considered the superhero community's chief doctor.
Batman recovers her heart, and Dr. Mid-Nite restores it to her body; however, the doctor also makes a prognosis on whether she can still return to her former life swinging through rooftops. While Selina is still in a coma, she encounters Zatanna, who apologizes for not warning her about Hush. She tells Selina that she was so happy about her relationship with Bruce that she ignored the other warnings in the cards. Zatanna gives her a little bottle supposedly containing aloe vera for her post-op scars. It is hinted that there is a little magic in there to help Selina with her recovery.
so i don't think she had a fake heart, she was just kept on life support by Dr. Mid-Nite until Batman found her actual heart