what is a calcium scan
Key points to remember. 1  A coronary calcium scan checks for calcium buildup in the coronary arteries. 2  Calcium in these arteries is a sign of heart disease. 3  A high score on a calcium scan can mean that you have a higher chance of having a heart attack than someone with a low score.ey points to remember. 1  A coronary calcium scan checks for calcium buildup in the coronary arteries. 2  Calcium in these arteries is a sign of heart disease. 3  A high score on a calcium scan can mean that you have a higher chance of having a heart attack than someone with a low score.