Cardiac screening test may help determine who should take aspirin to prevent heart attack

'Many heart attacks and strokes occur in individuals who do not appear to be at high risk,' researchers report following a recent study. 'Individuals with known CVD [cardiovascular disease] should take a daily aspirin, but the best approach for individuals without known CVD is unclear. If we only treat high-risk individuals with aspirin, we are going to miss a substantial portion of patients who eventually suffer heart attacks.'