Tricuspid Annular Peak Systolic Velocity (S′) in Children and Young Adults with Pulmonary Artery Hypertension Secondary to Congenital Heart Diseases, and in Those with Repaired Tetralogy of Fallot: Echocardiography and MRI Data

Although initially preserved, in this prospective study, impaired S′ values with increasing age were found in patients with repaired TOF and PAH-CHD. Persistent pressure overload in patients with PAH-CHD as well as volume overload in those with repaired TOF might lead to systolic RV functional impairment and increased RVEDVi. The validity of S′ data was supported by magnetic resonance imaging data (RVEDVi and RV ejection fraction).