When your heart rate peaks from exercising, the health care provider gives more radiotracer through your IV. If you can't exercise, you might be given medicine by IV that increases blood flow to the heart, just as exercise does. The next part of the test often involves walking on a treadmill or riding a stationary bike. The health care provider takes the first set of images of your heart. It takes a few minutes for your heart cells to absorb it. The substance may feel cold when it goes into your arm. ![]() The substance is also called a radiopharmaceutical.
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