It should be determined if a person is at high risk for myocardial infarction before conducting imaging tests to make a diagnosis.[14] People who have a normal ECG and who are able to exercise, for example, do not merit routine imaging.[14] Imaging tests such as stress radionuclide myocardial perfusion imaging or stress echocardiography can confirm a diagnosis when a person's history, physical exam, ECG and cardiac biomarkers suggest the likelihood of a problem.[14]