Article info

“Like a sound and its echo”


  1. Correspondence to Dr Piotr Szymański, Echocardiographic Laboratory, Valvular Heart Disease Department, Institute of Cardiology, Alpejska 42, Warszawa 04-628, Poland; p.szymanski{at}
View Full Text


Szymański P, Lipczyńska M, Klisiewicz A, et al
“Like a sound and its echo”

Publication history

  • Received September 5, 2013
  • Revised September 7, 2013
  • Accepted September 9, 2013
  • First published December 6, 2013.
Online issue publication 
December 06, 2013
  • Supplementary Data

    This web only file has been produced by the BMJ Publishing Group from an electronic file supplied by the author(s) and has not been edited for content.

    Files in this Data Supplement:

Request permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.