My wife works in a cardiac open heart step down unit at the hospital - very high success rates these days with that kind of stuff. Downright magic. Sending good vibes your way that the outcome is as expected!
Update: Surgery is done! They will be bringing my daughter up to the ICU soon. In fact just saw her pass us on the gurney. We'll speak to the surgeon after she's settled in her room. Then we'll be able to be with her.