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Effect of sildenafil on passive (mPAP ≥25 and PVR <3) (a) and reactive (mPAP ≥25 and PVR ≥3) (b) pulmonary venous hypertension. Median % change reported. *Based on Wilcoxon signed-ranks test of the percent change from baseline to 60 minutes; indicates significance at p<0.05. Abbreviations as in Table 2.
