Cardiovascular effects of the interventions on treatment groups.

Data presented as median (25th–75th percentiles). RVEF: right ventricle ejection fraction; TAAD: tricuspid-annulus-apex distance change; RV: Right ventricle; LVEF: left ventricle ejection fraction; LVEDV: left ventricle end-diastolic volume; LVESV: left ventricle end-systolic volume. * Cardiovascular parameters measured by magnetic resonance imaging at baseline (before) and one hour following the administration of Sildenafil or the placebo pill (after). Cardiovascular effects of the interventions on treatment groups.