| Seeing through the maze of complete left bundle branch block. | |
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MedLine Citation:
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PMID: 8021556 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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LBBB obscures many cardiovascular diagnoses, but it is now possible to diagnose LVH and MI in the presence of LBBB. It is possible from accumulated data to synthesize a new clinical entity: The Complete Left Bundle Branch Block Syndrome. This encompasses the following: Uncomplicated LBBB: (1) the abnormal ECG configuration with normal QRS axis; (2) reversed splitting of the cardiac second sound due to delay of aortic valve closure; (3) significant left ventricular systolic and diastolic dysfunction due to the abnormal sequence of left ventricular activation and relaxation; (4) ventricular septal hypokinesis, and during thallium stress testing ventricular septal perfusion defects which tend to invalidate the results of the test; (5) the vast majority of patients with LBBB have organic heart disease, but 16% have structurally normal hearts except for the conduction system disease; Complicated LBBB: (6) left or right axis deviation or QRS duration greater than 0.14 secs. indicates a greater degree of left ventricular disease and dysfunction than LBBB alone and nearly excludes the presence of conduction disease only; (7) disordered function of the SA node, AV node and right bundle branch. |
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Authors:
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C B Upshaw |
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Publication Detail:
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Type: Journal Article; Review |
Journal Detail:
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Title: Journal of the Medical Association of Georgia Volume: 82 ISSN: 0025-7028 ISO Abbreviation: J Med Assoc Ga Publication Date: 1993 Nov |
Date Detail:
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Created Date: 1994-08-02 Completed Date: 1994-08-02 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7505620 Medline TA: J Med Assoc Ga Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 593-9 Citation Subset: IM |
Affiliation:
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Department of Internal Medicine, Piedmont Hospital, Atlanta, GA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Bundle of His
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physiopathology Bundle-Branch Block / diagnosis*, etiology, physiopathology Diagnosis, Differential Electrocardiography* Exercise Test Hemodynamics / physiology Humans |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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