After completion of initial testing (exercise treadmill test +/- MSCT angiography), subjects will be returned to the referring physicians who will dictate further clinical management. The results of the exercise treadmill testing and coronary MSCT angiography (if applicable) will be provided to the referring physician. Additional selection of testing, consultation, and choice of therapy is at the discretion of the referring physician. For subjects assigned to the “no coronary MSCT angiography” arm, the referring provider will be instructed not to make MSCT an available option for these subjects if further testing is deemed appropriate. Otherwise, the protocol will not predetermine the clinical diagnostic or treatment course for the subject. This approach should simulate actual clinical practice and the previous standard of care (prior to availability of MSCT) and will allow assessment of downstream clinical resource utilization in an unbiased fashion.