Star Wars *Spoilers*

[Blackmane]

Padme didn't make it because of Anakin's anger. It choked the life out of her. Remember the doctor said that medically she was perfectly healthy, and they couldn't explain why she was dying. Then, when Vader awakens, the emperor tells him that he killed Padme in his anger. Thats what I think makes the whole thing so horribly ironic, Anakin was trying desperately to save Padme by getting stronger, but in the end, it was himself who he needed to save Padme from.