Sometimes an abnormality is not seen acutely during the test. With later more careful review of the images, an abnormality may be detected. It sounds like this is what may have happened. Also, was it actually a doctor doing the exercise part or just a technician? A technician is not qualified to report any findings and should not have told you anything about the results. If an abnormality were detected with the later more careful readings, then the next step is to do a catheter study and apply a stent if an abnormality is confirmed. Disregard anything you were told while having the study. It was not accurate. Hope this answers your query.