Hard time with medication after one bypass graft has failed

I was informed earlier this year that one of my bypass grafts after 9 years have failed. I have been told by my cardiologist and heart surgeon there is no more they can do. I had a stress echo test carried out in August 2010, I was told at the time that my bypass grafts were pristine condition, which I was doubtful about due to the way I was feeling. I then had to go for an angiogram with contrast in early December. I was told that the procedure had shown up a complete blockage in one of my bypass grafts (leg vein had been used). I was very anxious and explained to my cardiologists that I was quite happy to go and have another bypass operation, he explained that due to my other three grafts being pristine he thought it was rather doubtful that my heart surgeon would take the chance with further surgery, this proved to be true, however my cardiologist said that he would try laser angioplasty and gave me a 40% chance of success. I was still feeling unwell leading up to Christmas 2010, I was once again taken into hospital on Christmas Eve for another chemical echo stress test, after this chemical stress test I was told that I had probably suffered another heart attack and there was absolutely no way I could have the laser angioplasty now or any surgery.

I was prescribed nicorandil 10mg and bisoprolol 1.25mg leading up to 2.5mg.
I have been on beta blockers before and I don't get on with them, given the fact that I have horrendous tinnitus both these medications have contributed to levels of Tinnitus that I find horrendous. I have not slept for days.

I am awaiting a second opinion with regards to possible heart surgery or laser angioplasty.

While waiting does anyone know of any medication which may help without the Tinnitus side affects, as I do suffer with chest and throat pain.

Thanking you in anticipation
Roy