Total Body Perfusion in Patients With Chest Pain

Inclusion Criteria: * Documented history of chest pain with CT imaging showing a potential for obstructive coronary artery disease * Ability to sustain adenosine injection 0.14 mg/kg/min Exclusion Criteria: * Second or third degree AV-block without pacemaker * Sick sinus syndrome * Consumption of coffee or aminophylline within 12 hours of administration * Recent use of dipyridmole or dipyridamole-containing medications * Known hypersensitivity to adenosine * Unstable acute MI or acute coronary artery syndrome, and prior cardiac transplantation * Active wheezing and bronchospasm * Sinus bradycardia with HR\<40 bmp