Outcomes:
The primary outcome was the total peak gradient across the main pulmonary artery (MPA), right pulmonary artery (RPA), and left pulmonary artery (LPA); thereby, total peak gradient (TPG)= MPA+RPA+LPA measured by echocardiography in the postoperative period (pre-discharge echocardiogram). The secondary outcome was the reintervention by means of percutaneous or surgical intervention.