Document Classification

Section Type: RESULTS

Text: Sildenafil, compared to placebo, was associated with improved exercise tolerance as determined by the 6 min walk test (266. 67 + / -131. 45 m v. 170 + / -105 m ; p < 0. 005), decrease in modified Borg dyspnea score (3. 56 + / -1. 01 v. 5. 11 + / -1. 45 ; p < 0. 01), decrease in Doppler-estimated pulmonary artery systolic pressures (55. 33 + / -16. 52 mmHg v. 75. 33 + / -19. 75 mmHg ; p < 0. 005), improvement in New York Heart Association class (2 patients), and improvement in symptoms.