Regular low-dose Aspirin therapy, taken as directed by a doctor, is one of the important and effective prevention tools for your heart. Aspirin has been shown to prevent first and second heart attacks in people with cardiovascular disease. 
It can also reduce your risk of having a clot-related stroke if you have already had one. 
If you’re a confirmed high risk for heart attack, talk with your doctor about a low-dose aspirin regimen. It may reduce your risk of a first or second heart attack, or recurrent clot-related stroke.