I just had an idea. What if instead of dying from injuries, during her medical scan they discover that she has some kind of terminal condition that she had kept secret up to that point. It would help to intensify Anakin's tragedy as despite everything he did she was always destined to die.

Though I'm not sure how to convey that in the line or two that you have to work with.

Maybe something like:

"We discovered an inoperable mass in her cerebrum. The condition is terminal though complete determination of life expectancy will require further testing."