PERCUTANEOUS TRANSLUMINAL BALLOON PULMONARY VALVULOPLASTY USING DOMESTIC BALLOON CATHETER FOR CONGENITAL PULMONARY VALVE STENOSIS IN CHILDREN

Objective. To estimate the effect of percutaneous balloon pulmonary va lvuloplasty (PBPV) using domestic balloon catheter for congenital pulm onary valve stenosis (PVS) in infants and children. Patients and Metho ds. The data of 70 patients aged from 1.5 to 12 years (mean 5.5+/-3.4 years) who underwent PBPV using domestic balloon catheter for PVS in o ur institution were reviewed. Sixty-six patients had dome-shaped valve stenosis, and 4 had displastic valve stenosis. SaO(2) reduced in 5 pa tients and associated open foramen ovale was noted in 23. Predilatatio n, right ventricular systolic pressure ranged from 60 to 234 mmHg (mea n 115.75 +/- 36.15 mmHg). The systolic gradient (Delta P) from right v entricle to pulmonary artery was 89.92 +/- 38.25 mmHg. Balloon diamete r was selected 120%-142% of pulmonary valve annulus diameter (mean 132 %). All patients were followed up; for 3 months - 4 years by means of clinical examination, EGG, 2D-UCG, and Doppler-UCG. Results. After dil atation, Delta P reduced from 89.92 +/- 38.25 to 14.65 +/- 11.40 mmHg (P<0.001). The rate of decrease in transvalve gradient (Delta P) was 8 3.7%. No patients experienced procedure-related events. Mid-term follo w-up showed that no patients had clinical and instrumental complicatio ns. Doppler and ECG analyses showed that Delta P did not change signif icantly similar to immediate gradient after PBPV and right ventricular hypertrophy disappeared progressively 6 months after PBPV. Conclusion s. PBPV is a useful, safe and definitive procedure in the treatment of isolated PVS in infants and children. The properties and features of the balloon catheter produced by Shanghai Med-Tech Factory are similar to those of Med-Tech balloon cathter of U.S.A.