LAUSR

Author's summary Pulmonary arterial elastance in repaired TOF with low RV pressure was negatively correlated with pulmonary regurgitation (PR) severity, which may prevent PR, right ventricular (RV) dilatation, and left ventricular dilatation in the absence of significant pulmonary stenosis. Although many previous studies focused primarily on RV volume, the situation in patients with repaired tetralogy of Fallot is more complicated because pulmonary arterial elastance and compliance affect PR severity and RV volume. Our study showed that in low pulmonary arterial elastance group among repaired Tetralogy of Fallot with low RV pressure, RV and LV stroke volume is increased after pulmonary valve replacement and related to increased exercise capacity.