Nuclear Dual Isotope Stress Test

A nuclear dual isotope stress test evaluates the blood supply to your heart muscle during periods of exercise (stress) and at rest. This helps doctors determine if you have a blockage in one or more arteries of the heart.

The arteries that supply blood to the heart muscle can become clogged or narrowed from the buildup of plaque (called atherosclerosis or coronary artery disease). To examine your heart’s blood flow, we inject two safe, radioactive tracers (Thallium-201 and Technetium-99M) into your blood through an intravenous (IV) line inserted into a vein in your arm. Separate images of the tracers allow us to see the heart muscle receiving the blood supply more clearly.

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