Preoperative Testing for Silent Coronary Ischemia Using Coronary CT Angiography-derived Fractional Flow Reserve (FFRct) May Reduce Postoperative Myocardial Infarction and Cardiovascular Death in Patients Needing Lower-extremity Revascularization Compared to Standard Pre-operative Evaluation of Patients With no Cardiac Symptoms Undergoing Peripheral Vascular Surgery. (December 2019)