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Metabolic effects of corrective surgery in infants and children with congenital heart defects
K Puhakka1, J Räsänen, M Leijala
1Department of Anaesthesiology, Oulu University Central Hospital, Finland.
Insights
Surgical correction of congenital heart defects significantly lowered oxygen consumption in infants and children. This indicates reduced cardiopulmonary system load after corrective cardiac surgery, improving metabolic rates.
Area of Science:
- Pediatric Cardiology
- Cardiovascular Surgery
- Pediatric Critical Care Medicine
Background:
- Congenital cardiac malformations often lead to increased metabolic demands and cardiopulmonary stress.
- Left-to-right intracardiac shunts with heart failure are associated with significantly elevated oxygen consumption in pediatric patients.
Purpose of the Study:
- To quantify the immediate impact of surgical correction on oxygen consumption and carbon dioxide production in pediatric patients with congenital heart disease.
- To assess the reduction in metabolic rate following surgical repair of cardiac defects.
Main Methods:
- Indirect calorimetry was employed to measure oxygen consumption and carbon dioxide production.
- Measurements were taken in 25 infants and children immediately before and after surgical correction of their congenital cardiac malformations.
Main Results:
- Surgical correction resulted in a decrease in oxygen consumption, moving towards normal physiological levels.
- Patients with large left-to-right intracardiac shunts and heart failure exhibited the highest preoperative oxygen consumption.
- These specific patients experienced the most significant reduction in metabolic rate, up to 43%, post-surgery.
Conclusions:
- Corrective surgery for congenital cardiac malformations effectively reduces the immediate postoperative load on the cardiopulmonary system.
- The findings support the efficacy of surgical intervention in normalizing metabolic demands in pediatric patients with congenital heart disease.
Abstract:
We have measured oxygen consumption and carbon dioxide production by indirect calorimetry in 25 infants and children immediately before and after surgical correction of congenital cardiac malformations. Surgical correction of the cardiac defect caused a decrease in oxygen consumption towards normal. Greatly increased oxygen consumption values were observed before surgery in the infants with a large left-to-right intracardiac shunt and heart failure and the highest reduction in metabolic rate, up to 43%, was observed in these infants. The results indicate that corrective surgery for congenital cardiac malformations reduces the load on the cardiopulmonary system immediately after operation.