Figure 32-30 Pulmonary artery wedge pressure measurement creates a static column of blood connecting the catheter tip to a junction point where flow resumes in the pulmonary veins (PV) near the left atrium (LA). LV, left ventricle; PA, pulmonary artery; RA, right atrium; RV, right ventricle. (Redrawn from Mark JB: Atlas of Cardiovascular Monitoring. New York, Churchill Livingstone, 1998, Fig. 4-1.)