Hello. I read your question carefully and I understand your concerns. The blockage of the small artery that you are referring to, is probably in a diagonal branch of the left anterior descendent artery (in which, I suppose, was the stent implanted). At times, it can be a big artery, but in 95% of cases it is a small artery, which is responsible for a small territory of the heart. However, as small as it is, it can produce symptoms, like angina. With the proper discharge treatment, my opinion is that, in your case, it shouldn t cause you problems. My opinion is that you should take your therapy regularly and perform a stress test 1, 3 and 6 months after the stent implantation. An echocardiography would be appropriate after 3-6 months, to re-evaluate the function of the heart muscle. As stress is concerned, it is only a minor risk factor in generating coronary heart disease. The disease was there and stress was a plus factor to exacerbate it. Family history of heart disease, however, is a major factor. I recommend you measuring your cholesterol and triglyceride levels, keep a diet of low salt, high fibre (green vegetables and fruit) and performing a 60 minute physical activity per day. I hope I was helpful. Good day