My Mother In Law Is 75. She's In The Hospital

My mother in law is 75. She's in the hospital with 30% of her heart working. The doctors say that the front side of her heart is dead. Theyll be doing more tests tomorrow to see what the next steps are. Shes already had 8 stents placed over the last couple years. She woke up the other night having difficulty breathing and thats what drove her to the hospital. What is the prognosis?