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Accessory Mitral Valve Tissue

  • Anita SadeghpourEmail author
  • Azin Alizadehasl
Chapter

Abstract

Accessory mitral valve tissue (AMVT) is an extremely rare congenital cardiac anomaly of embryologic development and growth of the endocardial cushion first described by McLean in 1963. The incidence of this anomaly is unknown. It is an unusual cause for subvalvular left ventricular outflow tract (LVOT) obstruction. The common clinical presentations are due to LVOT obstruction [1–3].

Keywords

Accessory mitral valve tissue (AMVT) Left ventricular outflow tract obstruction (LVOTO) Echocardiography Endocardial cushion 

Supplementary material

Video 46.1

Parasternal long axis view showing a highly mobile redundant tissue attached to the mitral valve (MV) suggestive of accessory tissue mitral valve (ATMV) (WMV 606 kb)

Video 46.2

Large redundant accessory tissue mitral valve (ATMV) may appear as a cystic mass in transesophageal echocardiography (WMV 419 kb)

Video 46.3

Accessory tissue mitral valve (ATMV) in long axis view of transesophageal echocardiography (WMV 438 kb)

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Copyright information

© Springer-Verlag London 2014

Authors and Affiliations

  1. 1.Echocardiography Lab, Department of CardiologyAdult Congenital Heart Disease Clinic, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical ScienceTehranIran
  2. 2.Echocardiography Lab, Department of CardiologyRajaie Cardiovascular Medical and Research Center, Iran University of Medical ScienceTehranIran

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