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Updated: Aug 12, 2026

Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure
Published on: February 8, 2022
Cleft mitral valve in transposition with intact ventricular septum
Samuel Menahem1, Robert H Anderson
1Department of Cardiology, Royal Children's Hospital & Monash Medical Centre, Melbourne, Australia. sam.menahem@rch.org.au
This study details two cases of isolated mitral valve cleft in transposition with intact ventricular septum. These findings support the theory that this condition represents the spectrum
Area of Science:
- Cardiology
- Developmental Biology
- Congenital Heart Disease
Background:
- Transposition with intact ventricular septum is a complex congenital heart defect.
- The Taussig-Bing malformation is a related spectrum of cardiac anomalies.
- Understanding the developmental origins of these conditions is crucial for diagnosis and treatment.
Observation:
- Two cases of isolated mitral valve cleft were identified in transposition with intact ventricular septum.
- The mitral valve cleft was consistently located leftward in the pulmonary leaflet.
- This leftward positioning mirrors clefts observed in the Taussig-Bing malformation.
Findings:
- The observed mitral valve clefts provide further evidence for a shared developmental pathway.
- The findings suggest that transposition with intact ventricular septum may be an endpoint of the Taussig-Bing spectrum.
- This anatomical observation refines our understanding of cardiac development in complex congenital heart disease.
Implications:
- These findings enhance the understanding of the spectrum of cardiac development.
- This knowledge can aid in the diagnosis and classification of congenital heart defects.
- Further research into the developmental mechanisms is warranted.
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