Which of the following is true concerning the assessment of perioperative risk with noninvasive…

Which of the following is true concerning the assessment of perioperative risk with noninvasive stress imaging in patients undergoing noncardiac surgery? a. Percutaneous intervention reduces perioperative risk of MI in patients with a high risk dobutamine stress echocardiogram b. SPECT MPI identifies the need for cardiac treatment in high-risk patients c. Percutaneous revascularization has been shown to reduce risk of perioperative death in patients with high-risk myocardial perfusion stress imaging d. Results of preoperative stress MPI have not been found to be associated with outcomes in the perioperative period e. All patients undergoing noncardiac surgery should receive beta blockers regardless and so should not undergo preoperative stress imaging