Myocardial Ischemia Detection for Early Identification of Patients With Ischemic Chest Pain

"\-- The study coordinator will then obtain a 5-minute baseline high resolution (1000 samples/second), 12-lead resting ECG stream using H12+ holter ECG machine (Mortara Instruments, Milwaukee, WI). This ECG will be performed before the subject completed their clinical stress test.~* The patient will then complete the scheduled nuclear stress test that involves exercise treadmill testing followed by single-photon emission computerized tomography (SPECT) scan as per hospital protocols. The exercise treadmill test and SPECT nuclear imaging scan are clinical in nature, and therefore, separate from the research study.~* After completing the scheduled exam, the study coordinator will obtain another 5-minute 12-lead ECG stream prior to removing the chest electrodes but before their nuclear scan."