Document Detail

Mitral valve area by the pressure half-time method does not correlate with mean gradient in mitral valve repair patients.
MedLine Citation:
PMID:  21044983     Owner:  NLM     Status:  In-Data-Review    
AIMS: Pressure half-time is an inaccurate measure of mitral valve area in many clinical situations. The utility of the pressure half-time method to calculate mitral valve area after mitral valve repair is not well defined.
METHODS AND RESULTS: Forty-two patients with a repaired mitral valve were identified. Mitral valve area was calculated by both the pressure half-time method and the continuity equation. The two mitral valve areas were then directly compared and also correlated with mean gradient. The two mitral valve areas were significantly different from one another with a mean of 1.81 ± 0.53 cm(2) by continuity equation and 2.65 ± 0.69 cm(2) by pressure half-time. The continuity equation correlated well with mean gradient (ρ = -0.63), whereas the correlation for pressure half-time was weak (r = -0.08).
CONCLUSION: A non-linear, inverse correlation was found between mitral valve area by the continuity equation and mean gradient. No correlation was found between the pressure half-time method for mitral valve area and mean gradient. The continuity equation likely provides a better estimate of mitral valve area in repaired mitral valves.
Chad M House; William B Nelson; Glenn A Nickele; Imdad Ahmed; Ranjan Dahiya
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Publication Detail:
Type:  Journal Article     Date:  2010-11-01
Journal Detail:
Title:  European journal of echocardiography : the journal of the Working Group on Echocardiography of the European Society of Cardiology     Volume:  12     ISSN:  1532-2114     ISO Abbreviation:  Eur J Echocardiogr     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-02-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100890618     Medline TA:  Eur J Echocardiogr     Country:  England    
Other Details:
Languages:  eng     Pagination:  124-30     Citation Subset:  IM    
Section of Cardiology, Regions Hospital, 640 Jackson Street, Mail Stop 11102M, St. Paul, MN 55101, USA.
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