How does EDTA Chelation therapy work? (Part four)

Another article (Anderson, Hubacek, Wyse, and Knudtson, 2003) looked for evidence to see whether or not EDTA dilates arteries, which would support the theory of its increasing nitric oxide production in the endothelial cells. 

This double-blind, randomized study investigated the impact of infusions of EDTA with vitamins and minerals versus placebo (vitamins and minerals only) on endothelium-dependent brachial artery flow-mediated vasodilation in subjects with coronary artery disease who were also being “optimally treated with proven therapies for atherosclerotic risk factors.”  The researchers found significant differences in flow-mediated vasodilation between the treatment and placebo groups.