Coma Confidential by Uvi Poznansky

From USA Today bestselling author Uvi Poznansky comes a gripping medical thriller:
Ash finds herself in the ER diagnosed with coma. She has no memory of what has happened to her, but what she can do–despite what everyone around her might think–is listen to the conversations of her visitors. One of them is the man who raped her.
For Ash, there is little time to gather clues: blackouts are happening not only in the hospital but throughout California. The Russian hackers who are intent on sabotaging the power grid are trying to blackmail her boyfriend, Michael, into helping their cause. And what better way for them to do it but by kidnapping her out of the hospital?