discrete subaortic stenosis
Definition A well-defined membranous or fibromembranous ring of tissue that partially or completely encircles the subvalvular aorta. Discrete subaortic stenosis may progress and cause severe left ventricular hypertrophy–VH and major aortic insufficiency–AI.
Aetiology Uncertain, possibly inherited due to multiple genes, but more likely acquired due to abnormal flow patterns within the left ventricular vestibule
Caption—from Eur J Echocardiogr (2008) Magnified view of left ventricular outflow tract (LVOT) and aortic valve (AV) from apical view showing eccentric moderate aortic regurgitation. LA, left atrium
Management Operative correction often requires sharp ring resection with or without septal myectomy.
Prognosis Post-resection recurrence is common.
Synonym Discrete subvalvar aortic stenosis
Eur J Echocardiogr (2008) 9 (1): 63-64.