| Doubling of the ventricular rate by interpolated junctional extrasystoles resembling supraventricular tachycardia. | |
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MedLine Citation:
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PMID: 20497352 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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In a study of seven cases of paroxysmal supraventricular tachycardia, it was noted that the fast rate was not caused by the mechanism of rapid firing, reentry, or dual atrioventricular nodal conduction but by an abrupt doubling of the rate by interpolation of junctional extrasystoles between adjacent sinus beats while the sinus mechanism remained undisturbed. Dual ventricular response to a single atrial depolarization was seriously considered in each case. The intervals separating the junctional extrasystoles tended to be quite fixed, thus conforming to the pattern of junctional parasystole with an intrinsic rate very close to the rate of the dominant sinus rhythm. The paroxysms of tachycardia were transient, lasting a few seconds to 3.5 minutes. The onset and termination of the paroxysms were completely unpredictable and appeared unrelated to any change in the basic sinus rate or other identifiable mechanism. In only one case, case 7, the concept of dual ventricular response appeared tenable. However, as will be discussed later, the mechanism of junctional parasystole was found to be physiologically more acceptable. |
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Authors:
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Rashid Massumi; Michael Shehata |
Publication Detail:
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Type: Journal Article Date: 2010-05-21 |
Journal Detail:
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Title: Pacing and clinical electrophysiology : PACE Volume: 33 ISSN: 1540-8159 ISO Abbreviation: Pacing Clin Electrophysiol Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-08-13 Completed Date: 2010-12-06 Revised Date: - |
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: 945-9 Citation Subset: IM |
Affiliation:
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Cedars Sinai Heart Institute, Los Angeles, California, USA. rmassumimd@yahoo.com |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Aged Cardiac Complexes, Premature / physiopathology* Electrocardiography Female Heart Rate* Humans Male Middle Aged Tachycardia, Paroxysmal / physiopathology* Tachycardia, Supraventricular / physiopathology* Ventricular Function* Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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