My father had heart bypass surgery at age 42, he has had 3 heart attacks duing his life time. Then seven years after his bypass surgery, he had to have another bypass surgery for the bypass, those veins that were used started to get blocked. Then today, I found out that he is having problems again, it's been 9 years since his 2nd bypass surgery. Between the 1st and 2nd bypass, he had stints put in and then a few months after the stints, he had to have chemo put around the stints because the stints were beginning to become blocked. Now that he is having problems again, I am scared that he is going to have to have bypass surgery again. Before the second bypass, the doctor was scared that they were going to hit the main artery that was laying over the heart from the first bypass. Is it going to be worse the third time? How many times can he have bypass surgery? He does take medication every day for the problem. He also exercises daily, until this time, he can't walk down the driveway without being out of breath.