If you're over 40 and have any family history of heart disease, take heart! A new speedy scan warns patients of cardiac problems before they have a heart attack. This test could save your life. Most heart attacks are the first and last warning a person gets. The newly devised test is the electron beam tomography (EBT) that takes 3D pictures that point out calcium in coronary arteries, a known predictor of heart disease. The test is not offered everywhere yet so if you qualify, ask your doctor where it's available.