This is a bit more difficult than simple valvar PS as previously discussed. Patients with critical valvar PS are cyanotic at birth and require PGE maintenance of pulmonary blood flow. Right-sided hypoplasia is rarely a limiting factor in newborns with critical PS. The appearance of a dysplastic valve, by angiography or echocardiography, has not been found to predict dilation outcome in neonates (1).
KeywordsPatent Ductus Arteriosus Pulmonary Valve Pulmonary Blood Flow Right Bundle Branch Block Patent Ductus Arteriosus Close
- Sommer RJ, Rhodes JF, Parness IA. Physiology of critical pulmonary valve obstruction in the neonate. Catheter Cardiovasc Interv 2000;50:$473-479.Google Scholar