Explain balloon pulmonary valvuloplasty, Biology

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Pulmonary stenosis is a relatively common congenital heart defect. Usually these children with mild to moderate pulmonary stenosis survive into childhood. Since bicuspid pulmonary stenosis is infrequent (< 20 per cent) and heavy calcification uncommon, pulmonary stenosis is well suited for balloon pulmonary valvuloplasty.

Classification of Severity of Pulmonary Stenosis

Severity to PS                         Transvalvular Gradient

Mild PS                                             <  50 mmHg

Moderate PS                                 50 - 100 mmHg

Severe PS                                        > 100 mmHg


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