Abstract
Pulmonary stenosis may occur at valvular, subvalvular and supravalvular level. The morphology and size of the right ventricular outflow tract, the pulmonary valve, the main pulmonary artery and the pulmonary bifurcation can be well displayed by two-dimensional echocardiography. Colour Doppler reveals possible sites of obstruction and direction of the jet in valvular stenoses. It is the method of choice for assessment of pulmonary and tricuspid regurgitation. Pulsed wave Doppler and continuous wave Doppler provide the possibility of noninvasive determination of gradients in the right ventricular outflow tract as well as determination of right ventricular systolic pressure by interrogation of tricuspid regurgitation.
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7.1 Electronic Supplementary Material
Video 7.1
The apical four-chamber view in a neonate with critical pulmonary stenosis shows significant apical hypertrophy of the right ventricle. The atrial septum bulges in diastole from right to left (AVI 15122 kb)
Video 7.2
Colour Doppler in the apical four-chamber view shows severe tricuspid regurgitation (same patient as in Video 7.2) (AVI 4036 kb)
Video 7.3
Parasternal long-axis view of the right ventricular outflow tract in a neonate with severe pulmonary valve stenosis shows limited separation (doming) of the valve in systole (AVI 22853 kb)
Video 7.4
Colour Doppler in the parasternal long-axis view of the right ventricular outflow tract (same patient as in Video 7.3) shows acceleration of flow in systole and minor pulmonary regurgitation in diastole (AVI 4961 kb)
Video 7.5
The parasternal short-axis view in a neonate with critical pulmonary stenosis displays significantly thickened leaflets of the pulmonary valve resulting in severely restricted opening of the valve (AVI 5014 kb)
Video 7.6
In a patient with Noonan syndrome and dysplastic pulmonary valve, the parasternal short-axis view shows narrowing at the sinotubular junction. Although the valve was dysplastic and thickened (proven by angiocardiography), this finding is not demonstrated by echocardiography (AVI 10028 kb)
Video 7.7
Colour Doppler in the parasternal short-axis view (same patient as in Video 7.6) shows turbulence and significant acceleration of flow starting at valvular level (AVI 3598 kb)
Video 7.8
The high left parasternal short-axis view in a newborn with stenotic bicuspid valve shows thickening and incomplete separation of the valve leaflets (AVI 8674 kb)
Video 7.9
Significant thickening of the valve leaflets in the setting of a tricuspid pulmonary valve is present in this neonate with critical pulmonary stenosis (AVI 18851 kb)
Video 7.10
Colour Doppler in the parasternal short-axis view at the level just below the aortic valve in a child with double-chambered right ventricle shows obstruction due to anomalous muscle bundles well below the pulmonary valve (WMV 1540 kb)
Video 7.11
Obstructing anomalous muscles in an adolescent with double-chambered right ventricle are well displayed in the parasternal short-axis view at the level of the aortic valve (same patient as in Video (WMV 1290 kb)
Video 7.12
Colour Doppler in the subcostal coronal view shows significant obstruction due to anomalous muscle bundles below the outflow tract in this child with double-chambered right ventricle (AVI 3224 kb)
Video 7.13
Colour Doppler in the parasternal short-axis view at the level of the pulmonary bifurcation in a neonate with tetralogy of Fallot shows stenosis at the origin of the left pulmonary artery due to narrowing by ductal tissue (AVI 2470 kb)
Video 7.14
Colour Doppler in the parasternal short-axis view in an infant with Williams-Beuren syndrome shows turbulence and acceleration of flow in the small left due to stenosis of the pulmonary bifurcation (AVI 7391 kb)
Video 7.15
Colour Doppler in the subcostal coronal view of the right ventricular outflow tract in a newborn with critical pulmonary valve stenosis shows significant obstruction and acceleration of flow at valvular level (AVI 3187 kb)
Video 7.16
Colour Doppler in the parasternal long-axis view of the right ventricular outflow tract shows minor amount of physiological pulmonary regurgitation in a 4-year-old child with normal cardiovascular findings (AVI 4301 kb)
Video 7.17
Colour Doppler in the subcostal RAO view of a child with combined pulmonary stenosis and regurgitation shows acceleration of flow during systole due to obstruction at valvular level and significant pulmonary regurgitation directed towards the transducer in diastole. Note the dilated central pulmonary arteries (AVI 15597 kb)
Video 7.18
Colour Doppler in the parasternal short-axis view of the pulmonary bifurcation shows reverse flow in the main and central pulmonary arteries indicating severe pulmonary regurgitation in a 3-year-old child following repair of tetralogy of Fallot. Pulmonary regurgitation in this case can be explained by the requirement of a transannular patch (AVI 2494 kb)
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Hofbeck, M., Deeg, KH., Rupprecht, T. (2017). Pulmonary Stenosis. In: Doppler Echocardiography in Infancy and Childhood. Springer, Cham. https://doi.org/10.1007/978-3-319-42919-9_7
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DOI: https://doi.org/10.1007/978-3-319-42919-9_7
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