Heart scans, also known as coronary calcium scans, provide pictures of your heart's arteries (coronary arteries). Doctors use heart scans to look for calcium deposits in the coronary arteries that can narrow your arteries and increase your heart attack risk. The result of this test is often called a coronary calcium score.Heart scans can show that you may have a higher risk of having a heart attack or other problems before you have any obvious symptoms of heart disease. Heart scans aren't for everyone, though.