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European Journal of Echocardiography 2008 9(4):569-571; doi:10.1016/j.euje.2007.08.008
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Published on behalf of the European Society of Cardiology. All rights reserved. © The Author 2008. For permissions please email: journals.permissions@oxfordjournals.org

The vanishing subaortic membrane

Rachel Levine Berger and Itzhak Kronzon*

NYU Medical Center, Non-Invasive Cardiology Laboratory, 560 First Avenue, New York, NY 10016-6502, USA

Received 9 July 2007; accepted after revision 22 August 2007; online publish-ahead-of-print 1 January 2008.

* Corresponding author. Tel: +1 212 263 5665; fax: +1 212 263 8461. E-mail address: itzhak.kronzon{at}med.nyu.edu


  Abstract

A fixed subaortic membrane is a rare cause for left ventricular outflow tract obstruction. This case report describes an unusual echocardiographic presentation of a subaortic membrane in which the membrane, initially not seen, was identified only after a linear shadow posterior to the membrane was seen on a transesophageal echocardiogram. This represents an unusual demonstration of an ultrasound beam ‘dropout’ of a subaortic membrane.

Keywords: Subaortic membrane; Shadow artefact


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