Understanding Coronary Calcium Scores
A coronary artery calcium scan can help refine cardiovascular risk in selected patients—but the number is useful only when interpreted in context.
What is a coronary calcium score?
A coronary artery calcium score is obtained from a non-contrast CT scan that detects calcified plaque in the coronary arteries. The result is reported as an Agatston score. A score of zero means no calcified plaque was detected; higher scores generally reflect a greater burden of coronary atherosclerosis.
Who may benefit?
The test is often most useful when a patient's cardiovascular risk is uncertain and the result could change a prevention decision—such as whether to begin or intensify cholesterol-lowering therapy. It is not automatically appropriate for everyone.
What does a zero score mean?
A score of zero is reassuring in many people, but it does not mean that cardiovascular risk is literally zero. Age, symptoms, smoking, diabetes, family history, and other high-risk features still matter.
What does a positive score change?
A positive score confirms the presence of coronary atherosclerosis. Depending on the overall clinical picture, it may support more intensive attention to LDL cholesterol, blood pressure, exercise, nutrition, smoking cessation, and other preventive strategies.