Hi I am 64, retired person, have undergone cabg 13 years ago. In dec 14, I experienced angina again. Ecg, tmt and ct angiogram confirmed that there are new blocks in the grafts. I have been advised to take vasodilators with other routine medicines. Another surgery or angioplasty were ruled out. My query is how long should I survive on vasodilators. Wouldn't I become resistant to this drug after some time. Is second surgery possible in my case. Is there no other option at all. For your kind information I walk 40 minutes daily without any significant pain though I feel some discomfort initially for a few minutes. I carry sorbitrate tablets always with me. Will this tablet help in an emergency. I would be grateful for your kind advice. With best regards.