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Updated: Jul 8, 2026

Technique and Patient Selection Criteria of Right Anterior Mini-Thoracotomy for Minimal Access Aortic Valve Replacement
Published on: March 26, 2018
Surgical intervention of mitral valve aneurysm: a case report
Kazuki Mori1,2, Satoshi Takebayashi3, Masato Morita3
1Department of Cardiovascular Surgery, NHO Beppu Medical Center, Oita, Japan. kazumori@oita-u.ac.jp.
Background:
Mitral valve aneurysm is a rare structural abnormality characterized by a saccular protrusion of the mitral valve leaflet. The diagnosis of a mitral valve aneurysm can be challenging, especially when echocardiography fails to show a clear saccular appearance.
Case Presentation:
A 66-year-old male patient exhibited no symptoms but demonstrated echocardiographic findings indicative of a suspected cardiac tumor on the anterior mitral leaflet. Transesophageal echocardiography revealed nodular lesions on the anterior mitral leaflet, each measuring 11 × 5 mm. The findings also revealed mild mitral regurgitation. Intraoperatively, the lesions were identified as aneurysmal protrusions of the anterior mitral leaflet. Mitral valve repair was deemed unfeasible; therefore, mitral valve replacement was performed.
Conclusion:
The diagnostic challenge of mitral valve aneurysm, particularly in atypical cases, highlights the importance of thorough echocardiographic evaluation.
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