This takes about 15 minutes. Next, the technician injects Lexiscan through the IV line. You will either walk slowly on a treadmill (if you are able) or rest on a bed or chair. The technician injects more nuclear imaging material.
How accurate is a nuclear stress test?
If a patient has blockage of the blood flow to the heart or if they've had a heart attack in the past, it will show up," says Mieres. Nuclear stress tests are 90% accurate, compared with exercise stress tests, which are about 75% accurate for men and just over 60% accurate for women.
What does a nuclear stress test look for?
The test can show the size of the heart's chambers, how well the heart is pumping blood, and whether the heart has any damaged or dead muscle. Nuclear stress tests can also give doctors information about your arteries and whether they might be narrowed or blocked because of coronary artery disease.