Pulmonary stenosis
| Identify area of narrowing with imaging and colour Doppler studies |
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| • parasternal outflow tract and short axis great artery views |
| Measure maximum spectral velocity at any areas of aliasing |
| Assess severity of pulmonary regurgitation |
| • right ventricular size and backflow from pulmonary artery into the ventricle |
| Check right ventricular pressure from signal of tricuspid regurgitation |
| Transoesophageal imaging may be of assistance |
| Remember in distal obstruction imaging poor and spectral velocity unreliable |