Drinking two or more diet drinks a day may increase the risk of heart disease, heart attack and stroke in otherwise healthy postmenopausal women, according to findings presented yesterday at the American College of Cardiology’s 63rd Annual Scientific Session in Washington, D.C.The population analysis looked at diet drink intake and cardiovascular health in almost 60,000 women participating in the Women’s Health Initiative Observational Study and found that, compared to women who never or only rarely consume diet drinks, those who consume two or more a day are 30 percent more likely to have a cardiovascular event and 50 percent more likely to die from related disease.If two curves go up, someone is going to imply causality.