What is the role of stress testing in preoperative risk assessment for a patient with recent myocardial infarction?

• A. It primarily evaluates lung function unrelated to ischemia
• B. It directly visualizes the coronary arteries
• C. It assesses inducible ischemia and helps guide need for revascularization
• D. It has no role in preoperative risk assessment

Answer: (C)

The key idea is that stress testing after a recent myocardial infarction is used to detect inducible ischemia and to guide decisions about revascularization before planned noncardiac surgery. By provoking the heart with exercise or pharmacologic stress and imaging the resulting blood flow and wall motion, we can identify areas of the heart that become ischemic under stress. If stress testing reveals inducible ischemia, this suggests substantial residual coronary disease and higher perioperative risk, making revascularization before surgery a reasonable option to reduce that risk. If there is no inducible ischemia, the perioperative risk is lower and proceeding with optimized medical therapy and careful monitoring is more appropriate. Stress testing does not visualize the coronary arteries directly—that’s what angiography does—so its strength lies in showing functional, reversible ischemia rather than anatomy alone. It indeed has a role in preoperative risk assessment, so ruling it out would miss a critical tool for risk stratification and planning.