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Did We Misunderstand How to Calculate Total Stroke Work in Mitral Regurgitation by Echocardiography?
MedLine Citation:
PMID:  22531597     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Background: Total stroke work (TSW) is used for the estimation of cardiac efficiency in mitral regurgitation (MR). We should be cautious about the interpretation of this parameter, especially when it is assessed by non-invasive methods such as echocardiography. Methods and Results: For the calculation of regurgitant stroke work, regurgitant volume is usually multiplied by left atrial (LA) pressure. However, by considering the left ventricular (LV) pressure-volume loop, it would be more appropriate to multiply regurgitant volume and the LV pressure, not the atrial one. Conclusions: We might underestimate TSW when we use LA pressure for the estimation of regurgitant stroke work.
Authors:
Yasushige Shingu; Yoshiro Matsui
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-4-25
Journal Detail:
Title:  Circulation journal : official journal of the Japanese Circulation Society     Volume:  -     ISSN:  1347-4820     ISO Abbreviation:  -     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-4-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101137683     Medline TA:  Circ J     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Cardiovascular and Thoracic Surgery, Hokkaido University Graduate School of Medicine.
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