Reframing Left Atrial Dissection

Q: What is the clinical evidence from this study?

Study design: Editorial. Population: Covered atrioventricular groove rupture complicated by left atrial dissection. Intervention: Percutaneous transaortic closure with a ventricular septal defect occluder.

Q: What does this research mean for the field?

Contained atrioventricular groove rupture complicated by left atrial dissection can be successfully managed via percutaneous transaortic closure using repurposed septal occluder devices guided by multimodality imaging in patients at prohibitive surgical risk. Novelty: ClaimNovelty.SYNTHESIS. Consensus alignment: ConsensusAlignment.NEUTRAL.

Edoardo Zancanaro; Roberto Lorusso; Tommaso Hinna Danesi

doi:10.1016/j.jaccas.2026.108913

July 1, 2026JACC Case ReportsOpen Access

Reframing Left Atrial Dissection

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Key result

Percutaneous transaortic closure guided by multimodality imaging is a viable bailout strategy for contained atrioventricular groove rupture and left atrial dissection in patients with prohibitive surgical risk.

Graphical abstract published by JACC Case Reports — Graphical abstract · Published by JACC Case Reports · CC BY-NC-ND

Key Points

Examine the pathophysiological mechanisms, imaging workflows, and transcatheter bailout strategies for contained atrioventricular groove rupture and left atrial dissection following mitral valve replacement.
Evaluated technical and anatomical considerations from the first percutaneous transaortic repair of contained atrioventricular groove rupture complicated by left atrial dissection.
Developed a comparative management framework integrating conservative watchful waiting, surgical reintervention, and catheter-based closure supported by multimodality imaging.
Left atrial dissection and overt type I left ventricular rupture represent an anatomopathological spectrum with historical intraoperative mortality exceeding 75% in surgical series.
Percutaneous closure achieved defect sealing using a retrograde transaortic route and an off-label muscular ventricular septal defect occluder with a 7-mm waist matched to cardiac computed tomography dimensions.
Identified a dual-driver false-lumen perfusion mechanism sustained by a high-pressure left ventricular jet and a secondary low-pressure interatrial septal shunt.

Structured PICO

P

Population

Patients with contained atrioventricular groove rupture and left atrial dissection (LatD) following mitral valve surgery.

I

Intervention

Percutaneous transaortic closure using off-label repurposed devices (e.g., muscular ventricular septal defect occluder) guided by multimodality imaging.

Limitations

Unknown long-term durability of repurposed septal occluders implanted into postsurgical, friable tissue
Risk of late hemolysis, device dislodgement, and residual or recurrent shunting
Lack of a dedicated multicenter registry to guide patient selection criteria
Unknown long-term durability of repurposed septal occluders implanted into postsurgical, friable tissue.
Risk of late hemolysis, device dislodgement, and residual or recurrent shunting with percutaneous closure.
Current evidence is limited to single cases or small case series.

Implication

Structured, imaging-driven, and heart team-led percutaneous closure with repurposed devices provides a viable bailout strategy for contained atrioventricular groove rupture and left atrial dissection in patients at prohibitive surgical risk.

Abstract

[Figure: see text]

Discussion

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Cite This Study

Zancanaro et al. (2026) conducted an editorial in Covered atrioventricular groove rupture complicated by left atrial dissection. Percutaneous transaortic closure with a ventricular septal defect occluder was evaluated. Percutaneous transaortic closure guided by multimodality imaging is a viable bailout strategy for contained atrioventricular groove rupture and left atrial dissection in patients with prohibitive surgical risk.

synapsesocial.com/papers/6ad0fc6c3afa093ea9acfe62 https://doi.org/10.1016/j.jaccas.2026.108913

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Reframing Left Atrial Dissection

Key Points

Structured PICO

Limitations

Implication

Abstract

Discussion

Cite This Study

Reframing Left Atrial Dissection

Key Points

Structured PICO

Limitations

Implication

Abstract

Discussion

Cite This Study

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