Outcomes and Predictors of Reintervention in Patients With Pulmonary Atresia and Intact Ventricular Septum Treated With Radiofrequency Perforation and Balloon Pulmonary Valvuloplasty

Abstract

Radiofrequency perforation and valvuloplasty (RFV) is an effective initial treatment in patients with pulmonary atresia and intact ventricular septum (PA-IVS) and mild to moderate right ventricle and tricuspid valve hypoplasia. Outcomes and risk factors for the need for additional interventions in these patients are poorly defined. All patients with PA-IVS who underwent RFV at our center between January 2000 and July 2011 were reviewed. Twenty-three patients met the inclusion criteria. All patients underwent successful valvuloplasty with no procedural deaths and one major complication. Excluding two patients with limited follow-up, 6 (29%) patients underwent no subsequent interventions, whereas 9 (42%) patients underwent surgical right-ventricular outflow tract augmentation. All except one patient with adequate follow-up have a biventricular circulation with saturation >92%. Patients who did not undergo any right-ventricular outflow tract intervention after valvuloplasty had a significantly lower gradient across the pulmonary valve after valvuloplasty (9.9mmHg±8.4 vs. 19.1mmHg±10.4, p=0.05). Significantly more patients who received a supplemental source of pulmonary blood flow had a tricuspid valve z-score <-0.7 compared with patients who did not receive supplemental blood flow [2 (15%) vs. 7 (70%), p=0.008]. In our cohort of patients with PA-IVS, radiofrequency perforation with valvuloplasty was an effective and safe first step in establishing a biventricular circulation. Postvalvuloplasty pulmonary valve gradient may be predictive of subsequent outflow tract intervention, and tricuspid hypoplasia may be predictive of the need for a supplemental source of pulmonary blood flow.