[Right ventricular outflow tract reconstruction with monocusp patch].

Two kinds of monocusp patch were used for reconstruction of right ventricular outflow tract in patients with a variety of congenital heart defects. A bovine pericardial patch with monocusp (MVOP) was used in 11 patients (group M), and a separate transannular outflow patch (STOP) with turned-down equine pericardial monocusp was used in 10 patients (group S). Mean age at operation was 9 years 5 months in group M, and 7 years 9 months in group S. There was one operative death in group M. Survivors have completed a mean follow-up of 19 months. There were no late deaths. In early postoperative period, mean peak systolic pressure gradient between right ventricle and main pulmonary artery was 21 +/- 11 mmHg in group M and 21 +/- 11 mmHg in group S, which were not statistically significant. During follow-up period, no significant increase of peak systolic pressure gradient was noted in both groups. In late postoperative period, pulmonary regurgitation was moderate in 7 and severe in 1 in group M, while it was non-significant in 1, mild in 6 and moderate in 2 in group S. The difference between two groups was significant (p < 0.005). In conclusion, both types of patches equally relieved right ventricular outflow obstruction, but STOP prevented postoperative pulmonary regurgitation more effectively.