What a coronary calcium score can—and cannot—tell you about cardiovascular risk, and how it may fit into a thoughtful prevention strategy.
What the test measures
A coronary artery calcium scan is a specialized CT study that detects calcified plaque within the coronary arteries. The result is expressed as a calcium score, which helps estimate the burden of calcified atherosclerosis.
How the result is used
The score is most useful when it adds clarity to a prevention decision. It may help refine cardiovascular risk when the need for cholesterol-lowering therapy or other preventive measures is uncertain.
What the score does not show
A calcium score is not a complete picture of coronary health. It does not directly measure all non-calcified plaque, and it does not replace a clinical evaluation when symptoms such as chest discomfort or shortness of breath are present.
The larger prevention picture
The value of any test depends on context. Blood pressure, cholesterol, diabetes, smoking history, family history, exercise, nutrition, sleep, and other factors all matter when developing a personalized prevention plan.