Hello, I understand your concern. Your stress test results mean that under great effort, strain or exercise, your heart vessels tend to contract or close, leading to starvation of the heart muscle of oxygen. It basically means that there is a risk of you having a heart attack under higher effort than normal. Your doctor will be able to give you further information on this condition and on how to prevent more serious problems. I hope this answers your question. Wishing you all the best.