A 72-year-old woman with a history of myocardial infarction 8 months ago, currently on dual antiplatelet therapy and a beta-blocker, presents for elective total knee replacement. She reports dyspnea on climbing two flights of stairs and has ankle edema. On examination, blood pressure is 145/92 mmHg, heart rate 88 bpm, and bilateral ankle edema is present. What is the most appropriate next step in management?