Women who drink the most diet sodas may also be more likely to develop heart disease and even to die, according to a new study. Researchers found women who drank two or more diet drinks a day were 30 percent more likely to have a heart attack or other cardiovascular event," and 50 percent more likely to die, than women who rarely touch such drinks. The findings, being presented at a meeting of the American College of Cardiology, don't suggest that the drinks themselves are killers. But women who toss back too many diet sodas may be trying to make up for unhealthy habits, experts say. "Our study suggests an association between higher diet drink consumption and mortality," said Dr. Ankur Vyas, a cardiovascular disease expert at the University of Iowa Hospitals and Clinic, who led the study. Research has long shown that artificially sweetened drinks are not health drinks. While they may help people avoid more dangerous sugary sodas, studies show they don't help people lose weight. Vyas's team studied nearly 60,000 middle-aged women taking part in a decade-long study of women's health. They filled out a questionnaire on food and drinks as part of the study, including detailed questions on diet sodas and diet fruit drinks. After just under nine years, the researchers checked to see what happened to the women's' health. They found that 8.5 percent of the women who drank two or more diet drinks a day had some sort of heart disease. The women who drank the most drinks were also more likely to smoke, to be overweight, to have diabetes and to have high blood pressure, Vyas noted.