Hi Tallguy99.....I'm no expert on the medical side and that needs to be sorted if he has blockages....I hope others will respond soon. I can suggest reading the books by Dr Dean Ornish and Dr Caldwell Esselstyn (you can google them) both have shown reversal of disease in patients using diet. Important to sort out the medical treatment though. I hope you get some help soon there are risks with the blockages, so I would get treatment as soon as you've found a good surgeon, I wish you and your father all the best.