Figure 2.

Changes in end-expiratory right heart catheterization pressures from baseline to 6 months after randomization to treatment compared with baseline. End-expiratory pressures post–lung volume reduction surgery (LVRS) tended to be slightly lower compared with patients who were medically treated (MED), but none of the differences achieved statistical significance. PAD, pulmonary artery diastolic; PAM, pulmonary artery mean; RA, right atrial; RVD, right ventricular diastolic; RVS, right ventricular systolic; PAS, pulmonary artery systolic.