A new study is suggesting using the anti-depressant Lexapro may help prevent a stress-related heart condition. Researchers at Duke University School of Medicine say people with the condition may not develop noticeable symptoms, but their heart muscle is not receiving adequate blood supply. However, they discovered that people taking Lexapro were more than two-and-a-half times less likely to be affected by the condition. It can be triggered by emotional stress. The study was funded by the U.S. National Heart, Lung and Blood Institute. It's published in the latest issue of the "Journal of the American Medical Association."