An adaptive response on the part of an obstructed artery is to become larger in the vicinity of an obstruction. Thus, the arteriosclerotic plaque appears smaller. But there is hope. While coronary artery disease cannot be cured, it can be turned into a benign illness compatible with a normal life span and with few if any symptoms in most patients. The best that can be said for chelation therapy is that any effectiveness in relieving chest pain is in the eyes of the beholder.
Testimony abounds about the relief of chest pain that occurs after a series of treatments.
The problem is that similar relief can be obtained with prayer, meditation. I wish it were true. Unfortunately, there is no scientific evidence that this treatment does what it claims. In itself, it may do no harm. Its danger lies in the fact that effective treatment is delayed or does not occur at all.