Abstract
Sub valvular aortic stenosis (SAS) is the second most common type of aortic stenosis, representing 14% of the obstruction in the left ventricular outflow tract (LVOT), with valvular aortic stenosis being the most common cause (70%).
Highlights
In 45–65% of patients, there is an association with other congenital cardiac defect, mainly ventricular septal defects, coarctation of the aorta, and bicuspid aortic valve
The left ventricular outflow tract (LVOT) obstruction progression is very variable; surgical correction is needed in most patients
The clinical presentation of sub valvular aortic stenosis may be varied accompanied by other birth defects the first case presented subaortic stenosis is not accompanied by another congenital malformation the evolution is without complications so far, the second case is accompanied by persistence of the arterioscy duct that did not receive surgical treatment, is in protocol for definitive treatment and the third case the patient received surgical treatment of the closure of the arteries, with severe aortic stenosis associated with a malformation of the supra aortic vessels has been reported to be this association in very rare
Summary
Sub valvular aortic stenosis (SAS) is the second most common type of aortic stenosis, representing 14% of the obstruction in the left ventricular outflow tract (LVOT), with valvular aortic stenosis being the most common cause (70%). The prevalence is 6.5 % of all congenital heart diseases in adults [1], it can occur as a discrete membrane under the aortic valve in the left ventricular outflow tract causing a tunnel-shaped obstruction, as a result of chordal fixation during the development stage [2].
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