About this trial
This study will evaluate the clinical efficacy and safety of udenafil, an orally administered, potent and selective inhibitor of PDE5, versus placebo for the treatment of adolescent who have had the Fontan procedure.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Males and females with Fontan physiology who are 12 to less than 19 years of age at enrollment.
Participant consent or parental/guardian consent and participant assent.
Participant fluency in primary language of country in which study is being conducted.
Current antiplatelet or anticoagulant therapy.
Disqualifiers
Height < 132 cm.
Weight < 40 kg.
Hospitalization for acute decompensated heart failure within the last 12 months.
Current intravenous inotropic drugs.
Trial design
Parallel
Treatments tested in this trial
Udenafil
DrugActive drug
Placebo
DrugMatching Placebo
Treatment groups
Trial outcomes
Primary outcomes
Change in Exercise Capacity
The change in exercise capacity (as measured by maximal VO2 at maximum exercise effort) from baseline to 26 weeks (or study completion)
Secondary outcomes
Change in VO2 at the ventilatory anaerobic threshold (VAT)
Change in peak oxygen consumption (VO2) from baseline to Week 26 as measured by maximal central cardiopulmonary exercise test (CPET) reading laboratory.
Change in Enhanced Liver Fibrosis (ELF) Score
Change from baseline to Week 26 in the Enhanced Liver Fibrosis (ELF) Score calculated by the change in the following biomarkers: hyaluronic acid, amino-terminal propeptide of type III collagen, and tissue inhibitor of metalloproteinase-1. subjects with scores of \<7.7 were assigned to the no or mild fibrosis group; 7.7 to 9.8 to the moderate fibrosis group, and \>9.8 to the severe fibrosis group.
Work rate (watts) at ventilatory anaerobic threshold (VAT)
Change from baseline to 26 weeks in work rate in watts at the ventilatory anaerobic threshold as measured by the central cardiopulmonary exercise test reading laboratory.
Change in ventilatory efficiency (VE/VCO2) at ventilatory anaerobic threshold
Change from baseline to Week 26 in ventilatory efficiency calculated by ventilatory efficiency divided by minute carbon dioxide production at the ventilatory anaerobic threshold (VE/VCO2 at VAT).
Sponsors and contacts
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