cardiac nuclear scanning, a nuclear scan used to detect myocardial ischemia, infarction, wall dysfunction, and decreased ejection fraction. It is commonly used as the imaging method portion of cardiac stress testing. Specific indications for this test include screening of adults for past and recent infarction, quantification and surveillance of myocardial infarction, and evaluation of the following: chest pain and ECG changes, myocardial perfusion before and after surgery, effectiveness of therapy for coronary artery perfusion, ventricular function in patients with myocardial disease, and status of patients receiving cardiotoxic drugs.