| Electrocardiographic criteria for the diagnosis of left anterior fascicular block. Left axis deviation and delayed intraventricular conduction. | |
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MedLine Citation:
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PMID: 1157535 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The two current criteria for diagnosis of left anterior fascicular block (LAFB) were evaluated; they are marked left axis deviation (LAD) and a delay in the time of inscription of the intrinsicoid deflection (ID) in lead aVL asynchronous to V6. From 400 electrocardiograms with a LAD of --30 degrees or greater, 62 percent showed asynchronous activation of the left ventricle. There was only a general relationship between the degree of LAD and delayed ID in aVL. The incidence of delayed ID in aVL was as follows: 2 percent with mean frontal QRS axis at 0 degrees; 9 percent at --15 degrees; 41 percent at --30 degrees; 69 percent at --45 degrees; 82 percent at --60 degrees; and 100 percent at --75 degrees or greater. The lack of correlation between both criteria in many instances questions their validity. The LAD alone should not be considered synonymous with LAFB. Recognition of delayed inscription of the ID in aVL is a useful supplemental criterion for diagnosis. |
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Authors:
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S Horwitz; E Lupi; J Hayes; W Frishman; M Cárdenas; T Killip |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Chest Volume: 68 ISSN: 0012-3692 ISO Abbreviation: Chest Publication Date: 1975 Sep |
Date Detail:
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Created Date: 1975-11-25 Completed Date: 1975-11-25 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0231335 Medline TA: Chest Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 317-20 Citation Subset: AIM; IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Bundle-Branch Block
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diagnosis* Electrocardiography* Heart Conduction System / physiopathology* Humans |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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