Abstract
This lesion includes a ridge or fibrous ring encircling the left ventricular (LV) outflow tract in varying distances from the aortic valve (AV). This fibrous process usually extends onto the AV leaflets and almost always makes contact with the ventricular aspect of the anterior mitral valve (MV) leaflet at its base.
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References
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Parasternal long-axis view showing a discrete fibrous ring encircling the left ventricular (LV) outflow tract with extension to the anterior MV leaflet (white arrows) (MPG 3592 kb)
2D and color Doppler study in apical 5 chamber view demonstrating the discrete subaortic membrane resulting turbulent flow in LVOT, Color flow Doppler study is helpful for identifying the level of stenosis. In the subaortic stenois turbulent flow originate from the LVOT rather than either the AV annulus or above the AV (MPG 3662 kb)
2D and color Doppler study in apical 5 chamber view demonstrating the discrete subaortic membrane resulting turbulent flow in LVOT, Color flow Doppler study is helpful for identifying the level of stenosis. In the subaortic stenois turbulent flow originate from the LVOT rather than either the AV annulus or above the AV (MPG 3314 kb)
Transesophageal echocardiography in long-axis view demonstrating fibromuscular ridge encircling the left ventricular (LV) outflow tract (white arrow) with extension to the anterior MV leaflet and aortic valve (MPG 1436 kb)
Typical LVOT narrowing in subaortic stenosis in left ventriculography (WMV 1426 kb)
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Sadeghpour, A., Alizadehasl, A., Kyavar, M. (2014). Subaortic Stenosis. In: Sadeghpour, A., Kyavar, M., Alizadehasl, A. (eds) Comprehensive Approach to Adult Congenital Heart Disease. Springer, London. https://doi.org/10.1007/978-1-4471-6383-1_36
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DOI: https://doi.org/10.1007/978-1-4471-6383-1_36
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