Device endothelialization and morphology assessments at 1 year using computed tomography angiography: comparison of traditional with novel puncturable atrial septal defect occluders

Device Endothelialization and Morphology Assessments Using CTA

Study Overview

The study evaluated a new type of atrial septal defect (ASD) occluder called ReAces, comparing it with traditional occluders one year after implantation.

Background

Complete endothelialization is often not achieved within 6 months after ASD occluder implantation, which can lead to complications. This study aimed to compare the performance of the ReAces occluder against traditional options using computed tomography angiography (CTA) after one year.

Methods

Fifteen patients were randomly selected for each type of occluder at Zhongshan Hospital, Fudan University. The study recorded patient characteristics and procedures, and CTA was used to assess the devices.

Key Findings

  • Both groups had similar defect sizes and occluder sizes.
  • The ReAces group showed significantly better results in several areas:
    • Central region thickness: 4.2 mm vs. 7.8 mm, p < 0.0001
    • Left atrial device-occupied volume: 1863.3 mm² vs. 4764.4 mm², p < 0.001
    • Device compression rates: 10.1% vs. 17.5%, p = 0.001
  • All patients with ReAces achieved complete endothelialization, while only 53.3% of the traditional group did (100% vs. 53.3%, p = 0.006).

Conclusions

The ReAces occluder showed a significantly higher rate of complete endothelialization and better morphology results compared to traditional occluders after one year.

Clinical Trial Registration

Registered at ClinicalTrials.gov, ID: NCT05371366, on 04/05/2022.

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