Can stress tests be wrong?
A stress test can be wrong for a variety of reasons.
For example, a nuclear stress test may be inaccurate if someone has severe blockages in all three main coronary arteries.
The test looks for differences in blood flow between areas of the heart..
How accurate are exercise stress tests?
Most exercise stress tests were normal. Of the 150 patients with an abnormal exercise stress test, 122 (81%) ultimately had confirmatory testing that demonstrated no coronary artery disease. In other words, 81% of the abnormal tests were confirmed to be false positives.
What can cause a false positive stress test?
Hence, superior blood pressure control prior to stress echocardiography may prevent some false-positive tests. In addition, a subset of patients has microvascular abnormalities, vasomotor changes, endothelial dysfunction, and/or small vessel coronary disease that can lead to false-positive stress echocardiography.
How long do stress tests last?
Your stress test will take around an hour, including both your prep time and the time it takes to perform the actual test. The actual test takes only around 15 minutes. You may have an exercise stress test in which you walk on a treadmill or pedal a stationary bicycle.
What are the warning signs of clogged arteries?
Do clogged arteries cause any symptoms?Chest pain.Shortness of breath.Heart palpitations.Weakness or dizziness.Nausea.Sweating.
What is the next step after an abnormal stress test?
Next step: Angiography After a stress test indicates an abnormality, heart specialists turn to a more invasive but also much more informative test, a heart catheterization with angiography. A long, thin tube called a catheter is threaded through blood vessels to the heart.