India, Sept. 18 -- Heart disease risk is rarely determined by a single factor. Even if you are free from one or several known risk factors, that does not necessarily mean your overall risk is zero. From blood pressure and cholesterol levels to smoking, diabetes and the presence of arterial plaque, multiple factors can interact to shape your cardiovascular health. Understanding this bigger picture is particularly important when interpreting tests such as a CT calcium score, which captures only one aspect of heart disease risk.

Dr Jeremy London, a board-certified cardiothoracic surgeon with 25 years of experience, is breaking down what a calcium score really reveals about your heart health - and whether a low or zero score necessarily mean...