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Conduction disturbances after surgical correction of ventricular septal defect by the atrial approach
Insights
The atrial approach for ventricular septal defect repair significantly reduces heart conduction problems like right bundle-branch block in children. This method offers a safer surgical option compared to the traditional ventricular route.
Area of Science:
- Pediatric Cardiac Surgery
- Electrophysiology
- Congenital Heart Disease
Background:
- Ventricular septal defects (VSDs) are common congenital heart abnormalities.
- Traditional VSD repair via ventriculotomy can damage the cardiac conduction system.
- Conduction disturbances, particularly right bundle-branch block, are frequent complications.
Purpose of the Study:
- To compare the incidence of conduction disturbances after VSD repair using the atrial versus the ventricular route.
- To evaluate the safety and efficacy of the atrial approach in minimizing cardiac conduction issues in young children.
Main Methods:
- Retrospective analysis of 39 children undergoing VSD repair via the atrial route (Group 1).
- Comparison with 19 children undergoing VSD repair via right ventriculotomy (Group 2).
- Assessment of conduction disturbances, including complete right bundle-branch block and left axis deviation.
Main Results:
- Complete right bundle-branch block occurred in 33.3% of Group 1 versus 78.9% of Group 2 (p<0.001).
- Left axis deviation associated with complete right bundle-branch block was also significantly reduced in Group 1.
- No significant difference in transient complete heart block or arrhythmias between groups.
Conclusions:
- The atrial approach for VSD repair significantly reduces the incidence of complete right bundle-branch block.
- This surgical strategy is associated with a lower risk of conduction abnormalities compared to the ventricular route.
- The atrial approach represents a safer alternative for VSD correction in young children.
Abstract:
Conduction disturbances have been documented after correction of ventricular septal defects by the ventricular route. Recently, repair of the ventricular septal defect has been through the right atrium to overcome damage to the conduction system and a right ventriculotomy. Thirty-nine children with ventricular septal defects under the age of 5 years were operated upon by the atrial route (group 1). The incidence of conduction disturbances in this group was compared with that occurring in 19 children of comparable age with a ventricular septal defect repaired via a right ventriculotomy (group 2). Complete right bundle-branch block developed in 13 of 39 children (33.3%) in group 1, compared with 15 of 19 children (78.9%) in group 2. This was a statistically significant reduction in complete right bundle-branch block in group 1. The incidence of left axis deviation occurring with complete right bundle-branch block was similarly statistically reduced. Transient complete heart block and arrhythmias were not statistically different in the two groups. The atrial approach to the repair of the ventricular septal defect significantly reduced the incidence of complete right bundle-branch block alone and occurring with left axis deviation.