What does this research mean for the field?

Surgical repair of partial and transitional atrioventricular septal defects results in a 2.9% reoperation rate and no mortality over a median follow-up of 50.5 months. Novelty: ClaimNovelty.CONFIRMATORY. Consensus alignment: ConsensusAlignment.SUPPORTS_CONSENSUS.

February 13, 2026Open Access

Repair of Partial and Transitional Atrioventricular Septal Defects: Mid-term Outcomes in a Single-center Cohort.

Key Result

Surgical repair of partial and transitional AVSDs had 0% mortality and a low 2.9% reoperation rate over a median 50.5-month follow-up in 136 patients.

Key Points

To assess the mid-term outcomes of surgical repair for partial and transitional atrioventricular septal defects in both pediatric and adult populations.
Retrospective review of patients who underwent surgical repair at a single center from January 2019 to December 2022.
Assessment of key outcomes such as mortality, reoperation rates, and atrioventricular valve repair techniques during follow-up.
Inclusion of 136 patients with a median follow-up duration of 50.5 months.
No early or late deaths reported among patients.
Reoperation rate was 2.9%, requiring LAVV reoperation in four patients, with no significant differences by AVSD subtype or age group.
Moderate or greater LAVV regurgitation showed no significant difference between patients with and without ring annuloplasty.

Structured PICO

What are the mid-term mortality and reoperation rates following surgical repair of partial and transitional atrioventricular septal defects in pediatric and adult patients?

Population

136 pediatric and adult patients who underwent surgical repair for partial (n=100) or transitional (n=36) atrioventricular septal defects (AVSDs)

Intervention

Surgical repair of partial or transitional AVSDs (including atrioventricular valve repair strategies such as suture or ring annuloplasty)

Outcome

Mortality and reoperation during follow-uphard clinical

Surgical repair of partial and transitional AVSDs yields excellent mid-term survival (0% mortality) and a low reoperation rate (2.9%) across both pediatric and adult populations.

Main Result

Absolute Event Rate: 0% vs 0%

Abstract

Background Surgical repair of partial and transitional atrioventricular septal defects (AVSDs) aims to achieve optimal outcomes with minimal need for reintervention. This study aimed to evaluate the mid-term outcomes of AVSD repair in both pediatric and adult populations. Methods We retrospectively reviewed all patients who underwent surgical repair for partial or transitional AVSDs at our center between January 2019 and December 2022. Key outcomes, including mortality, reoperation, and atrioventricular valve (AVV) repair strategies, were assessed during follow-up. Results A total of 136 patients were included (partial AVSD, n = 100; transitional AVSD, n = 36), with a median follow-up of 50.5 months. The median hospital stay was 14 days. No early or late deaths occurred. Reoperation was required in four patients (2.9%); all reoperations included left atrioventricular valve (LAVV) reoperation. However, reoperation rates did not differ significantly between AVSD subtypes (p = 1.000) or age groups (p = 0.177). The incidence of moderate or greater LAVV regurgitation showed no significant difference between patients with and without ring annuloplasty, either postoperatively or at the final follow-up (both p = 1.000). Conclusions Surgical repair of partial and transitional AVSDs results in excellent mid-term survival and a low reoperation rate across both pediatric and adult patients. Continued refinement of AVV repair strategies remains essential to reduce the risk of LAVV reintervention and prevent left ventricular outflow tract obstruction. Long-term follow-up is warranted to improve the evaluation of the durability of techniques such as suture annuloplasty and ring annuloplasty.