The ER tests rule out an incipient myocardial infarction (heart attack, MI), but do not rule out heart disease, which can, in turn, eventually causes a heart attack. A stress test, especially if done with a nuclear scan, can rule out heart disease with roughly 95 per cent accuracy. If the test were to come out positive for coronary heart disease (CAD) there is a slightly greater chance for a false positive, which only increases the need, in those cases, for an angiogram to determine precisely if there is any significant blockage.
Given your episode, it is quite appropriate that you have the stress test. If there had been a more suggestive finding with the EKG and/or blood work, ER staff would have recommended a more urgent stress test. You were stable at the time, so that's not an unusual approach, to just refer for stress test, since there is sufficient question as to whether or not you have any significant heart disease. I do hope you'll have the test soon, however, just to be certain what is going on. It may well be GI related, and that would be fine, but you do need to know what's up.
I hope this is helpful to you. Please follow up with us as needed. Good luck to you.
John Kenyon, EMT, CCT
Non-invasive cardiology tech, Emergency and Critical Care technician, Critical Incident Stress Mgmt. specialist