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Updated: Jun 20, 2026

Fully Endoscopic Mitral Valve Repair with Percutaneous Cannulation of Groin Vessels
Published on: May 26, 2023
Two-patch repair for atrioventricular septal defect with mitral aneurysm.
Hajime Imura1, Shun-ichiro Sakamoto, Yuji Maruyama
1Department of Surgery, Division of Cardiovascular Surgery, Nippon Medical School, Tokyo, Japan.
This case report details a rare partial atrioventricular septal defect in an elderly patient with a unique mitral aneurysm. Surgical repair involved a Dacron patch to support the mitral leaflet and prevent aneurysm rupture.
Area of Science:
- Cardiology
- Cardiac Surgery
Background:
- Partial atrioventricular septal defects are uncommon, particularly in elderly patients.
- Mitral valve abnormalities can present complex diagnostic and surgical challenges.
Observation:
- An elderly patient presented with an unusual partial atrioventricular septal defect.
- Preoperative echocardiography revealed mitral leaflet pouching and a ventricular septal defect.
- A mitral aneurysm was identified and diagnosed as a septal aneurysm.
Findings:
- Surgical intervention utilized a crescent-shaped Dacron patch placed beneath the atrioventricular valve.
- The patch creation of a new annulus supported the anterior mitral leaflet.
- This technique aimed to prevent mitral aneurysm rupture.
Implications:
- This represents a novel surgical approach for a rare cardiac anomaly.
- The described technique offers a potential solution for mitral aneurysms associated with atrioventricular septal defects.
- Further research may explore the long-term efficacy of this repair method.
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