Echocardiogram exists to measure the pumps. It is important to analyze and assume the level of stress as well. A doctor may decide to inject a dye into the heart arteries for the more accurate results. It does not necessarily must be a heart – it is possible to test the extremities in the same way too. The CT scans help to get the full picture of arteries and define the level of calcium and fatty deposits in people who suffer from obesity as extra weight is one of the risk factors and causes.