Why it's done

Your doctor may order a heart scan to get a better understanding of your risk of heart disease or if your treatment plan is uncertain.

A heart scan uses a specialized X-ray technology called multidetector row or multislice computerized tomography (CT). The scan creates multiple images that can show any plaque deposits in the blood vessels. A heart scan provides an early look at levels of plaque.

Plaque is made up of fats, cholesterol, calcium and other substances in the blood. It develops gradually over time, long before there are any signs or symptoms of disease. These deposits can restrict the flow of oxygen-rich blood to the muscles of the heart. Plaque may also burst, triggering a blood clot that can cause a heart attack.

When is a heart scan used?

A heart scan may help guide treatment if you have a low to moderate risk of heart disease or if your heart disease risk isn't clear. Your doctor can tell you if you might benefit from having a heart scan based on your risk factors.

A heart scan may also help motivate people at moderate risk to make important lifestyle changes and follow treatment plans.