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Management of infants with left ventricular outflow obstruction by conduit interposition between the ventricular apex
Insights
Apical-aortic conduit placement can offer life-saving treatment for infants with severe left ventricular outflow tract obstruction, enabling normal growth and development despite surgical risks.
Area of Science:
- Pediatric Cardiology
- Congenital Heart Surgery
- Pediatric Cardiac Critical Care
Background:
- Infants with severe left ventricular outflow tract obstruction (LVOTO) face life-threatening conditions.
- Traditional treatments may be limited in small infants.
- The apical-aortic conduit offers a potential surgical option.
Purpose of the Study:
- To evaluate the safety and efficacy of apical-aortic conduit interposition in infants with LVOTO.
- To assess the impact on infant growth, development, and cardiac function.
Main Methods:
- A retrospective review of nine infants (3 days to 13 months) with LVOTO.
- Surgical placement of an apical-aortic conduit.
- Postoperative assessment including echocardiography and cardiac catheterization.
Main Results:
- Two early and two late deaths occurred.
- Five patients showed normal growth and development 5-23 months post-surgery.
- Left ventricular function was not adversely affected and showed potential for improvement.
Conclusions:
- Apical-aortic conduit interposition can provide significant palliation for infants with lethal LVOTO.
- The procedure supports normal growth and development in survivors.
- While mortality is notable, it offers a viable option for previously untreatable conditions.
Abstract:
On the basis of experience with older children, creation of a double-outlet ventricle by interposition of a valved conduit between the apex of the left ventricle and the thoracic aorta appeared to be an option for treating life-threatening left ventricular outflow tract obstruction even in the small heart of the infant. Over the recent 3 year period, nine infants ranging in age from 3 days to 13 months with various forms of left ventricular outflow tract obstruction underwent placement of an apical-aortic conduit to decompress the hypertensive left ventricle. There were two early and two late deaths. Five patients are clinically well and developing normally 5 to 23 months following the operation. This series demonstrates that this operation permits normal growth and development in infants previously failing to thrive. Echocardiographic and cardiac catheterization data suggest that left ventricular function need not be adversely affected by placement of a stent in the small infant ventricle; rather, ventricular function can be markedly improved. Although the mortality in this series is appreciable, it appears that apical-aortic conduit interposition can provide significant palliation for infants with otherwise lethal left ventricular outflow tract obstruction.