Which data is NOT required before scheduling a cardiac catheterization after a stress test?

• A. Perfusion results
• B. Coronary anatomy
• C. Left ventricular function
• D. Hemodynamics

Answer: (A)

Before scheduling a cardiac catheterization after a stress test, you want information that helps you plan and gauge risk for the invasive procedure. Knowing the coronary anatomy, how well the left ventricle is functioning, and the patient’s current hemodynamic state are all essential pieces for planning, risk stratification, and peri-procedural management. Coronary anatomy confirms what you might expect to see and guides decisions about potential intervention. Left ventricular function shows how well the heart pumps, which affects anesthesia planning, anticipated complications, and prognosis. Hemodynamics, including blood pressure, heart rate, and rhythm, informs stability and monitoring needs during the procedure.

Perfusion results from a stress test, while informative about ischemia burden, are not required to schedule the catheter. The catheterization will directly evaluate the coronary arteries and LV function, and the decision to proceed is driven by anatomical suspicion and overall hemodynamic/risk assessment rather than perfusion imaging alone.