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technetium into your vein

substance attaches to red blood cells and passes through the heart.

Special cameras or scanners trace the substance as it moves through the heart area. The red blood cells inside the heart that carry the radioactive material form an image that the camera sees. The camera is synchronized with an electrocardiogram. Using computer software, the images are made to appear as if the heart is moving.

The test will show how well the blood is pumping through different parts of the heart.

The test also can check the motion of different parts of the heart. If one part of the heart is moving poorly while the others move well, it may mean that there has been damage to that part of the heart, possibly from a blockage in the artery that delivers blood to that area.

Blockages in the coronary arteries (coronary artery disease)Heart valve diseaseOther cardiac disorders that weaken the heart Past heart attack (myocardial infarction)Poor pumping function

Atrial septal defectDilated cardiomyopathyHeart failureIdiopathic cardiomyopathyPeripartum cardiomyopathySenile cardiac amyloidTesting whether a medicine has affected heart function

small amount of radiation.