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Repair of aortic coarctation in infants
M H Brouwer1, C E Kuntze, T Ebels
1Department of Thoracic Surgery, University of Groningen, The Netherlands.
Insights
Infant weight, not age, is a key risk factor for recoarctation after repair. A higher residual gradient post-surgery also increases recoarctation risk, especially with lower blood pressure.
Area of Science:
- Pediatric Cardiology
- Cardiovascular Surgery
- Medical Engineering
Background:
- Coarctation of the aorta is a congenital heart defect requiring surgical repair in infants.
- Recoarctation, the re-narrowing of the aorta, is a significant complication after surgical repair.
- Identifying risk factors for recoarctation is crucial for improving surgical outcomes.
Purpose of the Study:
- To identify preoperative and operative variables associated with recoarctation in infants undergoing coarctation repair.
- To compare the significance of patient weight versus age as a risk factor for recoarctation.
- To evaluate the impact of residual gradient on recoarctation risk.
Main Methods:
- Multivariate stepwise logistic regression analysis was used.
- Preoperative and operative data from 53 infants were analyzed.
- Risk factors including patient weight, age, and postoperative residual gradient were assessed.
Main Results:
- Infant weight was identified as an incremental risk factor for recoarctation, contrasting with previous studies emphasizing age.
- A residual gradient after repair was a strong incremental risk factor.
- The significance of the residual gradient was amplified when expressed as a ratio to systolic arm pressure, accounting for background hemodynamics.
Conclusions:
- Patient weight is a more critical factor than age in predicting recoarctation, suggesting that delaying surgery based on weight gain may be beneficial.
- Postoperative residual gradient, particularly in relation to systolic arm pressure, is a vital indicator for predicting recoarctation.
- These findings highlight the importance of considering weight and hemodynamic status in managing infants with coarctation of the aorta.
Abstract:
Fifty-three consecutive infants younger than 2 years underwent coarctation repair. A recoarctation occurred in 11 infants (21%). To determine variables associated with recoarctation, we entered preoperative and operative data into a multivariate stepwise logistic regression analysis. Patient weight was an incremental risk factor for recoarctation instead of age, in contrast to previously published studies. Furthermore, the residual gradient after the operation was a strong incremental risk factor. This risk factor was even more significant when expressed as a ratio of the systolic arm pressure, which takes background hemodynamics into account. Because weight is a more significant risk factor than age, we conclude that deferring operation is indicated only when the infant gains weight. Furthermore, a residual gradient is more important in the hemodynamic setting of a lower systolic arm pressure.