How do you prevent having a stroke?

Reversible risk: The primary way to prevent stroke is to check for and control reversible risk factors such as hypertension, diabetes, and high cholesterol. Certain other medical conditions, such as congestive heart failure, arrthythmias, and clotting disorders also increase stroke risk and should be managed aggressively. Daily low-dose Aspirin is useful in some cases- ask your pcp if it is a good idea for you.