During diagnostic coronary angiography, when are hemodynamic measurements obtained?

• A. As needed
• B. Only at the start
• C. Only after discharge
• D. Never

Answer: (A)

Hemodynamic measurements are obtained as needed during diagnostic coronary angiography to assess how the circulation is responding and to guide decisions in real time. As the procedure proceeds, clinicians may measure pressures and flow when there’s a question about the impact of a lesion, suspected ischemia, heart failure, or abnormal preload/afterload. This dynamic assessment helps determine lesion significance, plan interventions, and ensure safe management, rather than performing measurements only at one fixed time. Typical measurements include right-sided pressures, pulmonary artery pressures, pulmonary capillary wedge pressure, and cardiac output, often obtained with a catheter suitable for hemodynamic monitoring. They’re a tool used during the study as indicated, not something done only at the start, after discharge, or never.