Abstract
Critical aortic valve stenosis presenting in the neonatal period is clearly a unique entity with pathology, clinical features and prognosis all of which stand apart from left ventricular outflow tract obstruction seen in later life (Table 22.1). In large measure this is due to the considerable overlap that exists in the pathology of critical aortic stenosis in the neonate and the so-called hypoplastic left heart syndrome as described by Noonan and Nadas [47]. This relationship between aortic stenosis and the hypoplastic left heart syndrome disappears rapidly after the first month of life owing to the high mortality rates for both critical aortic stenosis and the hypoplastic left heart syndrome in this age period. It is rare for either supravalvar or the relatively discrete subvalvar forms of aortic stenosis to present in the neonatal period. In contrast to the spectrum of disease seen in the older child the site of obstruction in the newborn is valvar almost without exception [33]. This chapter therefore will deal primarily with valvar aortic stenosis with only a brief discussion of the Williams-Beuren syndrome and of mechanisms of subaortic stenosis.
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Dyck, J.D., Freedom, R.M. (1992). Aortic Stenosis. In: Neonatal Heart Disease. Springer, London. https://doi.org/10.1007/978-1-4471-1814-5_22
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