Introduction 82
Pulmonary valvar stenosis 82
Supravalvar pulmonary stenosis 84
Pulmonary artery stenosis 84
Double-chambered right ventricle 84
RVOTO can be due to abnormalities at the following levels:
• Mid RV.
• Infundibulum (as in tetralogy of Fallot).
• PV.
• Supravalvular region.
• Branch ± peripheral PAs....