| Patterns of Left Ventricular Contraction in Strain Vector Space Related to Bundle Branch Block with Heart Failure by Speckle-Tracking Echocardiography. | |
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MedLine Citation:
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PMID: 21376453 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The aim of this research is to study bundle branch block (BBB)-related patterns of radial strain in the left ventricles of patients with heart failure by speckle-tracking echocardiography. Twenty-seven left-BBB (LBBB), 10 right-BBB (RBBB), and 11 narrow QRS-complexes (non-BBB) patients and 11 healthy subjects were assessed. Strain fractions used to quantify thickening-during-systole and thinning-during-diastole, and timing parameters defined as time to onset-of-thickening and peak-strain were measured. Principal strain vectors were conducted on the fractions and parameters to analyze mechanical discoordination and dyssynchrony. Heart failure patients show a significantly greater extent of discoordination and dyssynchrony compared with healthy subjects. Significant differences between the LBBB and RBBB groups are demonstrated by deflection, a spatial characteristic of myocardial coordination. New information provided by these findings can provide a better understanding of BBB-related mechanisms of myocardial coordination and may be useful in improving patient selection, electrode placement and subsequent outcomes for cardiac resynchronization therapy. (E-mail: chanhl@mail.cgu.edu.tw). |
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Authors:
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Pei-Kuang Chao; Hsiao-Lung Chan; Chun-Li Wang; Lung-Sheng Wu |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-2 |
Journal Detail:
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Title: Ultrasound in medicine & biology Volume: - ISSN: 1879-291X ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-7 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0410553 Medline TA: Ultrasound Med Biol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 World Federation for Ultrasound in Medicine & Biology. Published by Elsevier Inc. All rights reserved. |
Affiliation:
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Department of Electrical Engineering, Chang Gung University, Taoyuan, Taiwan. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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