Accessory Mitral Valve Tissue

  • Anita SadeghpourEmail author
  • Azin Alizadehasl


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].


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)


  1. 1.
    Yetkin E, Turhan H. Recurrence of cerebrovascular thromboembolic event in a woman with accessory mitral valve during puerperium period. Int J Cardiol. 2005;105:102–3.PubMedCrossRefGoogle Scholar
  2. 2.
    Popescu BA, Ghiorghiu I, Apetrei E, et al. Subaortic stenosis produced by accessory mitral valve: the role of echocardiography. Echocardiography. 2005;22:39–41.PubMedCrossRefGoogle Scholar
  3. 3.
    Oliver JM, Gonzales A, Gallego P, Sanchez-Recalde A, Benito F, Mesa JM. Discrete subaortic stenosis in adults (increased prevalence and slow rate of progression of the obstruction and aortic regurgitation). J Am Coll Cardiol. 2001;38:835–42.PubMedCrossRefGoogle Scholar
  4. 4.
    Eiriksson H, Midgley FM, Karr SS, et al. Role of echocardiography in the diagnosis and surgical management of accessory mitral valve tissue causing left ventricular outflow tract obstruction. J Am Soc Echocardiogr. 1995;8:105–7.PubMedCrossRefGoogle Scholar
  5. 5.
    Sono J, Mckay R, Arnold RM. Accessory mitral valve leaflet causing aortic regurgitation and left ventricular outflow tract obstruction (case report and review of published reports). Br Heart J. 1988;59:491–7.PubMedCentralPubMedCrossRefGoogle Scholar
  6. 6.
    Willens HJ, Levy R, Perez A. Diagnosis of accessory mitral valve tissue by transesophageal echocardiography. Echocardiography. 1994;11:39–45.PubMedCrossRefGoogle Scholar
  7. 7.
    Prifti E, Frati G, Bonacchi M, Vanini V, Chauvaud S. Accessory mitral valve tissue causing left ventricular outflow tract obstruction(case reports and literature review). J Heart Valve Dis. 2001;10:774–8.PubMedGoogle Scholar
  8. 8.
    Garrett HE, Spray TL. Accessory mitral valve tissue (an increasingly recognized cause of left ventricular outflow tract obstruction). J Cardiovasc Surg (Torino). 1990;31:225–30.Google Scholar
  9. 9.
    Yoshimura N, Yamaguchi M, Oshima Y, Oka S, Ootaki Y, Tei T, et al. Clinical and pathological features of accessory valve tissue. Ann Thorac Surg. 2000;69:1205–8.PubMedCrossRefGoogle Scholar

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

Personalised recommendations