| Color Doppler tissue velocity imaging can disclose systolic left ventricular asynchrony independent of the QRS morphology in patients with severe heart failure. | |
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MedLine Citation:
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PMID: 15078398 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A QRS width greater than 120 ms is assumed to be a marker of inter- and intraventricular asynchrony in severe heart failure (HF) patients. Color Doppler tissue velocity imaging (c-TVI) with a time resolution of 10 ms was used to study regional left ventricular (LV) longitudinal systolic contraction pattern in HF patients with left and right bundle branch block (LBBB and RBBB) and in patients with normal QRS width. We studied 12 women and 23 men with severe HF, with a mean age of 66 +/- 11 years in New York Heart Association functional Class 2.9 +/- 0.6. Twenty patients had LBBB and 10 of those were accepted for cardiac resynchronization therapy by biventricular pacing (CRT). Ten patients had normal QRS width, and five had RBBB. In the echocardiographic apical four chamber view, regional peak LV tissue velocities and regional LV time differences of peak tissue velocities were compared at basal and mid-LV segments. There were no significant differences in regional mean peak tissue velocities among the patient groups. In patients with LBBB accepted for CRT, the LV lateral free-wall movement at basal LV was 29 ms delayed during main systole, almost significantly different from LBBB patients not accepted for CRT (P = 0.075). Even in HF patients with normal QRS width or RBBB, significant asynchronous longitudinal LV contraction was observed. Conclusions: For the detection of regional longitudinal LV contraction asynchrony in patients with severe HF, supplementary methods to the surface ECG, such as c-TVI, are strongly recommended. |
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Authors:
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Peter Schuster; Svein Faerestrand; Ole-Jørgen Ohm |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Pacing and clinical electrophysiology : PACE Volume: 27 ISSN: 0147-8389 ISO Abbreviation: Pacing Clin Electrophysiol Publication Date: 2004 Apr |
Date Detail:
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Created Date: 2004-04-13 Completed Date: 2004-07-30 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7803944 Medline TA: Pacing Clin Electrophysiol Country: United States |
Other Details:
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Languages: eng Pagination: 460-7 Citation Subset: IM |
Affiliation:
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Department of Heart Disease, Haukeland University Hospital and Institute of Medicine, University of Bergen, Bergen, Norway. peter.schuster@med.uib.no |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aged Bundle-Branch Block / ultrasonography Cardiac Pacing, Artificial Echocardiography, Doppler, Color* Electrocardiography Female Heart Failure Humans Male Systole Ventricular Dysfunction, Left / physiopathology, therapy, ultrasonography* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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