| Analysis of the origin of cardiac wall motion that constitutes myocardial velocity-time curves in patients with left bundle branch block. | |
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MedLine Citation:
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PMID: 19345303 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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Yoshihiro Seo; Tomoko Ishizu; Fumiko Sakamaki; Masayoshi Yamamoto; Tomoko Machino; Shigeyuki Watanabe; Kazutaka Aonuma |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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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:
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Created Date: 2009-04-06 Completed Date: 2009-07-09 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8801388 Medline TA: J Am Soc Echocardiogr Country: United States |
Other Details:
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Languages: eng Pagination: 331-6 Citation Subset: IM |
Affiliation:
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Cardiovascular Division, Graduate School of Comprehensive Human Science, University of Tsukuba, Ibaraki, Japan. yo-seo@md.tsukuba.ac.jp |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Algorithms* Bundle-Branch Block / complications, ultrasonography* Echocardiography / methods* Female Humans Image Enhancement / methods Image Interpretation, Computer-Assisted / methods* Male 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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