Why have you decided against bypass
surgery? blockages of 90,99,90% are severe and he could end up with a lot of dead
heart muscle, causing heart failure. If the hernia isn't causing major problems, I would leave it alone. In many cases surgery isn't a long term fix. Just coughing can cause the muscle to re-open and cause the hernia again. I have a small one and the recommendation was to leave it alone.