2.3 Postoperative RVOT evaluation
After discharge from the hospital, the patients were followed up at outpatient clinics in our hospital or the referring hospital with echocardiography, chest X-ray and electrocardiogram were regularly performed 1 month, 3 months, 6 months and annually, respectively. The patient’s latest echocardiographic records were collected to evaluate the diameter and pressure gradient throughout the RVOT and neo-PV, as well as the continuous-wave Doppler measured tricuspid valve regurgitation velocity to estimate RV pressure.
The degree of RVOTO was evaluated according to EAE/ASE recommendations for the echocardiographic assessment of valve stenosis (14). The indication for reoperation was based on a peak RVOT doppler velocity and the clinical examination (Ross classification for heart failure in children): a peak RVOT measured in the distal RVOT greater than 35 mmHg combined with Ross III assessment, or a peak ROVT greater than 50mmHg combined with Ross II assessment (15).