Evaluation and Treatment of Pulmonary Vascular Disease in Moderate to Severe CF

ClinicalTrials.gov 
19 Apr, 2019 ,

This study evaluates the ability of the drug sildenafil to improved exercise capacity, cardiac performance during exercise, and quality of life in patients with moderate to severe CF lung disease. 3/4 of the subjects will receive sildenafil and 1/4 will receive a placebo.

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