Most of the nearly 300,000 American women diagnosed with breast cancer each year receive radiation to help prevent a relapse, yet a new study suggests that those treatments increase the risk of heart attacks and of dying from heart disease up to 20 years later. Javid Moslehi, HMS instructor in medicine at the Dana-Farber Cancer Institute, wrote an editorial accompanying the study. Mehra Golshan, HMS associate professor of surgery at Brigham and Women’s Hospital, is also quoted.