Study Comparing CT Scan and Stress Test in Diagnosing Coronary Artery Disease in Patients Hospitalized for Chest Pain

Inclusion Criteria: * patient admitted for chest pain or pressure * patient at intermediate short term risk of MI or death (AHA/ACC guidelines) Exclusion Criteria: * prior diagnosis of coronary artery disease * evidence of ongoing myocardial infarction (and other high risk criteria per AHA/ACC guidelines) * contraindications to EKG-gated CT scanning with iodinated intravenous contrast under beta-blockade * pregnancy * presence of an implanted pacemaker or defibrillator * stress myocardial perfusion imaging, coronary CTA or coronary catheterization within the last 6 months