Has anyone here have a re do of a coronary arterial bipass graft and know anything nearly a re do?

My friend is going to have a re do of his 1st bypass surgery which be done over 15 years ago. I would like to know how it turns out the 2nd time around. He have already had vein salvaged out of his legs from the 1st bypass and in a minute I suppose they will take them out of his arms or somewhere else. I want to know what I can do to help him. He is a moment ago a really nice fella and is scheduled for the bypass on Friday.Has anyone here have a re do of a coronary arterial bipass graft and know anything nearly a re do?
They can use superficial vein in his arms, or the most adjectives use is using the internal mammry artery for bypass, or even his radial artery in his forarm.
My father simply had an Artery replaced and he have a quad bypass about 20 years ago. Not absolute if this is the same but he have an artificaial artery installed about 18" contained by length quite the living. he was vertebrae home within a week and it be less evasive as the imaginative bypass. I did not know they had atrificial arteries prety cool !!