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Figure 2 Pulmonary diffusion capacity for carbon monoxide (DCO), alveolar-capillary membrane-diffusing capacity (DM), pulmonary capillary blood volume (Vc'), mean wedge pulmonary pressure () and mean right atrial pressure () in group 1 patients before and after 150-ml and 750-ml saline infusions in the absence (open circles) and presence (solid circles) of enalapril in the therapeutic regimen. *p < 0.01 vs. baseline. p < 0.01 vs. corresponding value before enalapril treatment.