Hello and thanks you for using HCM. I carefully read your question and i understand your concern. I will try to explain you something. There are tree different ways to treat artery stenosis or blockage. These are what we call angioplasty with balloon, angioplasty with stents and surgery or coronary artery by pass. Angioplasty with balloon and stent means that we open the blockage using a balloon or a metallic structure that we call stents that is putted into the blocked artery to maintain it open. The selection of each of them depends on the number of stenosis, the position of the stenosis, the heart function and a lot of other factors and organ function. In general, in our daily practice a tree vessel disease is treated with surgery as your doctors already has told you. We use coronary stent-ing in people that does not support or want surgery if this is anatomically possible and this of course depend on the doctors experience. It is mandatory to see the anatomy of coronary artery and evaluate the patient to give a good opinion. Hope I was helpful. Wish to your father a good health. Best regards.