Document Detail

Analysis of the origin of cardiac wall motion that constitutes myocardial velocity-time curves in patients with left bundle branch block.
MedLine Citation:
PMID:  19345303     Owner:  NLM     Status:  MEDLINE    
Septal and lateral wall myocardial velocity-time curves from tissue Doppler imaging were analyzed to determine wall motion from which the velocity originated in 34 patients with left bundle branch and systolic dysfunction (ejection fraction < 45%). Longitudinal strain rate by speckle tracking imaging was assessed to identify whether corresponding wall motion was active or passive. All lateral peak velocities during the ejection period were derived from delayed active movement. However, septal peak velocities were more numerous and complex. Septal peak velocities during pre-ejection were derived from the first active movement in 29 patients (85.2%). Septal peak velocities during the ejection period were derived from the second active movement in 20 patients, passive movement in 9 patients, and first active movement in 5 patients. Because septal peak velocities were consistent with various wall motion types, identification of the origin of septal peak velocities, including during pre-ejection, may be important in identifying LV dyssynchrony based on the propagation of first active myocardial movements.
Yoshihiro Seo; Tomoko Ishizu; Fumiko Sakamaki; Masayoshi Yamamoto; Tomoko Machino; Shigeyuki Watanabe; Kazutaka Aonuma
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography     Volume:  22     ISSN:  1097-6795     ISO Abbreviation:  J Am Soc Echocardiogr     Publication Date:  2009 Apr 
Date Detail:
Created Date:  2009-04-06     Completed Date:  2009-07-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8801388     Medline TA:  J Am Soc Echocardiogr     Country:  United States    
Other Details:
Languages:  eng     Pagination:  331-6     Citation Subset:  IM    
Cardiovascular Division, Graduate School of Comprehensive Human Science, University of Tsukuba, Ibaraki, Japan.
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MeSH Terms
Bundle-Branch Block / complications,  ultrasonography*
Echocardiography / methods*
Image Enhancement / methods
Image Interpretation, Computer-Assisted / methods*
Middle Aged
Reproducibility of Results
Sensitivity and Specificity
Ventricular Dysfunction, Left / etiology,  ultrasonography*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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