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[Subvalvular aortic stenosis. Apropos of 3 cases]
E Bruckert1, P Assayag, P Thireau
1Service de Cardiologie, Hôpital Beaujon, Paris.
Annales De Cardiologie Et D'Angeiologie
|November 1, 1988
Summary
Congenital aortic stenosis can occur below the aortic valve due to fixed obstructions like membranes or tunnels. Early surgical intervention for symptomatic cases reduces heart failure risk.
Area of Science:
- Cardiology
- Pediatric Cardiology
- Congenital Heart Disease
Background:
- Congenital aortic stenosis is a narrowing of the aortic valve present at birth.
- Infravalvular aortic stenosis (IVAS) is a specific type characterized by obstruction below the aortic valve.
- Fixed subaortic obstructions are common causes of IVAS, including membranes and tunnels.
Observation:
- This report details three cases of infravalvular congenital aortic stenosis.
- Obstructions observed included thin membranes near the aortic ring, fibro-muscular membranes further from the ring, and infra-aortic fibro-muscular tunnels.
- Clinical symptoms and potential evolutionary risks associated with these conditions were reviewed.
Findings:
- Ultrasound cardiography (echocardiography) is crucial for accurate diagnosis and assessment of associated cardiac lesions.
- Symptomatic cases with a pressure gradient exceeding 40 mmHg warrant surgical intervention.
- Early surgical correction is associated with a decreased risk of developing heart failure.
Implications:
- Prompt diagnosis and surgical management of infravalvular aortic stenosis are vital for preventing heart failure.
- Understanding the diverse anatomical presentations of fixed subaortic obstructions aids in surgical planning.
- Early surgical intervention can significantly improve long-term outcomes for affected children.