My dad's open heart surgery

My dad came to visit in Sydney as I sponsored him but unfortunately today we found out he has 3 V disease , 3 vessel disease or coronary artery disease that means his 3 arteries  of heart are not working and only one is working at the moment, which is not in good condition to pump heart. He needs open heart bypass surgery. So please be kind enough as much as you can  to help my dad to do the surgery. I am a nurse I See surgery everyday at my work but when it comes to you its very hard to cope. Thank you so much for your generosity.
Daughter, Preena