| Anterograde and retrograde bradycardiac block in the His-Purkinje system. Finding in a patient with acute myocardial infarction. | |
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MedLine Citation:
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PMID: 620543 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A patient with an acute inferior myocardial infarction developed a complete atrioventricular block and intermitent periods of atrioventricular conduction with QRS complexes showing right bundle branch block associated with left anterior hemiblock. Recordings of the His bundle electrogram showed that the atrioventricular block was infrahisian and that in periods of resumed atrioventricular conduction, the His-ventricle (H-V) interval was long. Ventricular escape beats showed concealed conduction to the atrioventricular node. Anterograde atrioventricular conduction was always resumed through the left posterior division when the preceding division when the preceding intervals between ventricular escape beats and the atrium (V-A intervals) were shorter than 580 msec. The same phenomenon occurred with right ventricular pacing. A retrograde His potential could be observed. Retrograde conduction of ventricular escape beats and ventricular paced beats was blocked if the H-V interval and the interval between the His bundle and the ventricular paced beat (H-V interval) were long (more than 600 msec and 550 msec, respectively). The existence of an intermittent anterograde and retrograde bradycardiac infrahisian block was inferred from the previously mentioned data; a fixed retrograde atrial nodal block was also present. |
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Authors:
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J A Sobrino; A del Rio; I Maté; J Pasalodos; N Sobrino |
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Publication Detail:
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Type: Case Reports; Journal Article |
Journal Detail:
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Title: Chest Volume: 73 ISSN: 0012-3692 ISO Abbreviation: Chest Publication Date: 1978 Jan |
Date Detail:
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Created Date: 1978-03-21 Completed Date: 1978-03-21 Revised Date: 2004-11-17 |
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: 109-13 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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Acute Disease Bradycardia / etiology*, physiopathology Bundle of His / physiopathology* Bundle-Branch Block / etiology, physiopathology Electrocardiography Female Heart Block / etiology*, physiopathology Heart Conduction System / physiopathology* Humans Middle Aged Myocardial Infarction / complications*, physiopathology Purkinje Fibers / physiopathology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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