Why should I get a CT scan if I already have an ECG and cholesterol test?

Your ECG shows if you have heart rhythm problems, and your cholesterol test tells you about the risk for plaque buildup. But a CT scan actually shows you what’s happening inside your arteries right now. You can see exactly where any blockages are sitting, how serious they are, and what type of buildup you’re dealing with. A CT coronary angiogram (CT CAG) gives you the same detailed picture as the invasive procedure, minus the surgery and hospital time.