| Mechanisms of concealed ventricular bigeminy: the concept of concealed conduction in the reentrant pathway. | |
| | |
MedLine Citation:
|
PMID: 2433379 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
To clarify the presence of concealed conduction in the reentrant pathway of extrasystoles, 20 patients with ventricular extrasystoles were studied in whom two forms of interectopic periods were found in the same recording. One form is the XS1S2X period, in which two sinus QRS complexes (S1 and S2) intervene between an interpolated extrasystole (the first X) and the next extrasystole (the second X). The other is the XS2X or XS1X period, in which one sinus QRS complex intervenes between two extrasystoles. In all patients except one, the XX interval in the XS1S2X period was longer than that in the XS2X or XS1X period though shorter than twice the latter XX interval. This strongly suggests the presence of two-level block in the reentrant pathway of the extrasystoles. It appears that the sinus impulse S1 in the XS1S2X period invaded a large portion of the reentrant pathway and then was blocked at a distal site of the pathway; namely, that concealed conduction of the impulse S1 occurred in the pathway. It is suggested that such concealed conduction prolonged the conduction time of the following sinus impulse, S2, in the reentrant pathway, resulting in lengthening of the XX interval. The presence of three- or four-level block is also suggested. By the use of such multilevel block, mechanisms of concealed ventricular bigeminy are explained. |
| | |
Authors:
|
S Kinoshita; K Takahashi; K Nakagawa; A Sagawa; Y Tanabe; T Kawasaki |
Related Documents
:
|
1693199 - Persistent functional atrioventricular block in two patients with prolonged qt interval... 20392939 - Kv1.1 potassium channel deficiency reveals brain-driven cardiac dysfunction as a candid... 687479 - Re-entry via mahaim fibres as a possible basis for tachycardia. 12867229 - Prognostic implications of intraventricular conduction defects in patients undergoing s... 18026779 - Early surgical removal of membranous ventricular septal device might allow recovery of ... 1160189 - Experimental evaluation of some controversial points regarding the a-v conduction distu... 14578619 - Echocardiographic assessment of right ventricular obstruction in hypertrophic cardiomyo... 3822929 - Diffuse meningocerebral angiodysplasia and renal agenesis: a case report. 9456189 - Age and left ventricular ejection fraction identify patients with advanced breast cance... |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Journal of electrocardiology Volume: 19 ISSN: 0022-0736 ISO Abbreviation: J Electrocardiol Publication Date: 1986 Jan |
Date Detail:
|
Created Date: 1987-03-03 Completed Date: 1987-03-03 Revised Date: 2009-11-11 |
Medline Journal Info:
|
Nlm Unique ID: 0153605 Medline TA: J Electrocardiol Country: UNITED STATES |
Other Details:
|
Languages: eng Pagination: 67-75 Citation Subset: IM |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adult Cardiac Complexes, Premature / physiopathology* Electrocardiography* Female Heart Conduction System / physiopathology* Heart Ventricles / physiopathology Humans Male Middle Aged |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Effects of oral diltiazem on ventricular premature contractions.
Next Document: Angiogenesis in reproductive tissues.