Results of our study revealed that patients showed significantly decreased pressure gradient across PVS immediately post-BPV (85.58 ± 15.9 mmHg to 17 ± 13 mmHg) (p < 0.001). The procedure was ineffective only in eight (12.7%) children of whom five had re-BPV and three were operated on.Subpulmonary stenosis was seen in 4.8% of children pre-BPV; in 15% post-BPV and in ... إقراء المزيد