Fact is, neither you nor I nor your doctor knows for certain whether a stroke is in your future. It’s not really possible to predict with any certainty exactly who will suffer a stroke. To some extent, having a stroke is a matter of bad luck. But we do know that certain characteristics place you at a greater risk for stroke. We know that you are more prone to this particular form of bad luck if you have high blood pressure, smoke cigarettes, and/or have heart disease, diabetes, or high blood cholesterol levels. Researchers have identified a number of indicators that can help predict the likelihood of stroke. Some you can influence; others you can’t.