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[Subaortic stenosis associated with atrioventricular septal defect. A rarely mentioned condition]
M C Bembom1, P P Paulista, A T Kiyose
1Instituto Dante Pazzanese de Cardiologia, São Paulo.
Arquivos Brasileiros De Cardiologia
|April 1, 1993
Summary
A 14-year-old patient developed severe subaortic stenosis after atrioventricular septal defect repair. Early and late postoperative monitoring for left ventricle outflow tract obstruction is crucial.
Area of Science:
- Cardiovascular Surgery
- Pediatric Cardiology
- Congenital Heart Disease
Background:
- Atrioventricular septal defects (ASDs) are congenital heart conditions requiring surgical correction.
- Surgical repair of ASDs can sometimes lead to complications affecting the left ventricle outflow tract (LVOT).
- Subaortic stenosis is a potential complication following ASD repair.
Observation:
- A 14-year-old male presented with severe subaortic stenosis in the late postoperative period after total correction of an atrioventricular septal defect.
- Diagnosis was confirmed using echocardiography and cardiac catheterization.
- The patient required reoperation for resection of the subaortic stenosis.
Findings:
- Atrioventricular septal defects are associated with a narrow and potentially deformed left ventricle outflow tract.
- This anatomical predisposition increases susceptibility to obstruction, both preoperatively and postoperatively.
- Late-onset subaortic stenosis can occur even after successful initial repair.
Implications:
- Routine echocardiographic and hemodynamic evaluation is recommended in the operating room and during the late postoperative period.
- Vigilant monitoring for LVOT obstruction is essential in patients with repaired atrioventricular septal defects.
- Early detection and intervention can prevent severe complications associated with subaortic stenosis.