You most probably had a CT scan of the heart which has shown builup of calcium in the coronary arteries which are present around the heart.
Calcium is present in the atherosclerotic plaques which produce obstruction in the coronary arteries supplying blood to the heart muscle.Narrowing of these arteries due to plaque formation can cause and haert attacks.
Heart CT scan is used to see the extent and location of this calcium builup signifying the extent of coronary artery damage.
A scoring system is used to quantify the risk for coronary artery disease.
If you have been told that you have calcium buildup around heart you need to see a cardiologist to determine further treatment if required.
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Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice.