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Left ventricle-aortic conduits in pediatric patients
The Journal of Thoracic and Cardiovascular Surgery
|July 1, 1984
Summary
Left ventricle-aortic conduits effectively relieve outflow obstruction in pediatric patients. However, high rates of reoperation due to valve failure indicate potential long-term complications.
Area of Science:
- Cardiovascular Surgery
- Pediatric Cardiology
- Biomedical Engineering
Background:
- Severe left ventricular outflow tract obstruction requires surgical intervention.
- Porcine valved conduits have been used to address these obstructions.
Purpose of the Study:
- To evaluate the efficacy and long-term outcomes of left ventricle-aortic porcine valved conduits in pediatric patients.
- To compare outcomes between younger (<2 years) and older (2-14 years) pediatric groups.
Main Methods:
- Retrospective analysis of 13 pediatric patients who received left ventricle-aortic porcine valved conduits between 1974 and 1982.
- Surgical techniques included direct left ventricle connection or use of a right-angle connector, with distal anastomosis to ascending or abdominal aorta.
Main Results:
- All patients achieved relief of left ventricle-aortic gradients (mean residual gradient = 4.3 mm Hg).
- Mortality was 100% in the younger group (<2 years) and 10% in the older group (2-14 years).
- 78% of survivors required reoperation for conduit valve failure or related complications, with one patient needing a second reoperation.
Conclusions:
- Left ventricle-aortic conduits offer immediate relief of left ventricular outflow tract obstruction.
- High incidence of late complications necessitates consideration of alternative procedures like aortoventriculoplasty (Konno) for potentially better long-term results.