The time interval for the peak gradient to reach its midpoint (pressure half time) should not be used, in patients with high filling pressures, ASDs, significant AR or immediately after balloon valvuloplasty as it can underestimate the severity of MS.
Robert O Bonow, Blase A Carabello et al.
Circulation 2006 August 1, 114 (5): e84-231
Oh J, Seward JB, Tajik AJ.
The Echo Manual 3rd edition. Lippincott, Williams, Wilkins. 2007
Kern MJ.
The Cardiac Catheterization Handbook 4th Edition. Mosby 2003
© 2020 QxMD Software Inc., all rights reserved. No part of this service may be reproduced in any way without express written consent of QxMD. This information should not be used for the diagnosis or treatment of any health problem or disease. This information is not intended to replace clinical judgment or guide individual patient care in any manner. Click here for full notice and disclaimer.