Women who see sparkling zigzag lines or lose vision before a migraine attack may be at particular risk of future cardiovascular problems. Although no one yet knows why, Harvard researcher Dr. Tobias Kurth and his team say participants in the Women's Health Study who experienced warning signs of migraine were more than twice as likely to have heart attacks and strokes as those who did not. Usual suspects--such as genetics, hypertension, and elevated cholesterol levels--may be to blame. Dr. Kurth stresses that migraine with aura does not immediately cause a heart attack and that women can protect themselves by not smoking: keeping blood pressure, cholesterol levels, and weight down: eating plenty of fruit, vegetables, and grains: and exercising.