Cleft mitral valve in transposition with intact ventricular septum
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Updated: Aug 12, 2026

Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure
Published on: February 8, 2022
Samuel Menahem1, Robert H Anderson
1Department of Cardiology, Royal Children's Hospital & Monash Medical Centre, Melbourne, Australia. sam.menahem@rch.org.au
Abstract:
We describe two cases of an isolated cleft of the mitral valve in transposition with intact ventricular septum. The cleft is positioned leftward in the pulmonary leaflet, at about 2 o'clock, when viewed from below looking at the cardiac short axis with the right ventricle to one's left hand. Such clefts, when seen in the Taussig-Bing malformation are also positioned leftward. In keeping with our current knowledge of cardiac development, our cases provide further evidence that transposition with an intact ventricular septum is the end-point of the Taussig-Bing spectrum.
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