# Biventricular repair using subvalvular techniques for unbalanced atrioventricular septal defect

## TL;DR

A 19-month-old girl with a rare heart defect underwent successful biventricular repair, showing improved health and adaptation to normal circulation.

## Contribution

This case demonstrates the successful use of subvalvular techniques for biventricular repair in an unbalanced atrioventricular septal defect.

## Key findings

- The patient showed minimal heart failure after surgery.
- She gained weight and adapted to biventricular circulation.
- Subvalvular techniques enabled successful biventricular repair.

## Abstract

We report the case of a 19-month-old girl with a right-dominant unbalanced atrioventricular septal defect and severe right-sided atrioventricular valve regurgitation who underwent biventricular repair using basal chordae resection, artificial chordae reconstruction and a left-sided atrioventricular valvuloplasty. At 14-month postoperative follow-up, the patient had minimal heart failure, gained weight and adapted to biventricular circulation.

An unbalanced atrioventricular septal defect is an atrioventricular canal with 2 ventricles, one being disproportionately small, and a candidate for biventricular repair (BVR).