Outcomes after Pulmonary Valve-Preserving Correction of Tetralogy of Fallot Using Intraoperative Pulmonary Valve Annulus Balloon Dilatation

Background: In tetralogy of Fallot (TOF) correction, it is preferred to achieve a pulmonary valve (PV)-preserving correction. For small PV annuli, a transannular patch (TAP) can be used but is associated with increased rates of reoperations. Therefore, PV-preserving strategies for small PV annuli are needed. A strategy to increase PV annulus size during TOF correction is intraoperative balloon valvuloplasty (BVP) of the PV. This study aims to evaluate if TOF correction with intraoperative BVP for patients with small PV annuli can achieve comparable results to regular valve-sparing TOF correction in patients with normal-sized PV annuli.