How do I help my brother who has CHD

My brother 33 has unfortunately been told there is nothing they can do and will only have hours-days left of life after he gets disconnected. He doesn’t want to accept it and wants to keep fighting for his life. His vitals have been getting better and he has an infected kidney that has been getting slightly better, but they did a Cat scan and it did not look good, he has clots everywhere in his body, his heart, lungs, kidneys. He has little to no circulation below his extremities, they inserted a balloon in his heart twice and they both ruptured within hours and the cause is due to his bypass that sits right across his abdomen and does not follow his aora. They said the balloon was the last resort and they do not have any other options to go with. He’s been hospitalized for a week now and is currently on DOBUTAMINE, HEPARIN, VASOPRESSIN, BUMETANIDE, they have been pumping drugs on him to keep him alive but cannot find any other options to help save his life, they have been telling us the same things for over a week, he keeps telling them to keep him alive. His wife tried talking to him about hospice but he’s fighting that he wants to be transferred to another hospital for a 2nd opinion, mind you he was already transported to a heart transplant hospital in which where he was denied and is currently hospitalized at. He wants to keep fighting but Drs cannot find any other way to help him. How can we help him through this ,it hurts us seeing him like this, he barely eats, can’t walk anymore, he’s fatigued, we always prayed for more time but this time our prayers are not being heard we’re not ready but too we don’t want to see him suffer anymore.