Nuclear Stress Test

A nuclear stress test shows how well blood flows through your heart and arteries while you are resting and during physical exertion. In this test, a small amount of a radioactive substance is injected into your body. This substance allows images of the heart to be recorded so your doctor can see how well the heart is pumping blood, if a part of the heart has been damaged, and if any of the arteries that feed the heart are blocked.

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