What are thr potential outcomes from a Stress Echo test?

Dr. Lamonaca, I was wondering, you've had a stress echocardiogram, a stress echo, what are the potential outcomes from this? From the stress echocardiogram we can have either a completely negative test, so this means that we have excluded any heart problems, or we can have a positive test which means that we have a suspicion that there is a blocked arteries for which then we go to the FADA stage which is a coronary angiogram. However, sometimes the test could be negative, don't show results, and in about 15% of cases, even though the test is negative, but you continue to have symptoms, then we can even do a FADA test like an angiogram. So a negative stress test can exclude a heart problem 85% of the people but still 15% of the people even if the test is negative can have heart problems. Thank you very much.