Document Detail

The syndrome of normal electrocardiograms, accessory pathways and paroxysmal tachycardias.
MedLine Citation:
PMID:  870578     Owner:  NLM     Status:  MEDLINE    
Tachycardias may be associated with the pre-excitation syndrome, a short PR interval or a prolonged QT interval. This report describes seven patients whose electrocardiograms (ECGs) did not reveal any of the above-named conditions. All of the patients presented with syncopal episodes, and the history of palpitations was elicited in five of the patients. His bundle electrogram studies in all of the patients showed an essentially unchanged AH interval with atrial pacing rates up to 180 beats/min. This can only be explained by a total bypass of the AV node. Two of the patients were also paced from the ventricle, and an unchanged pacing stimulus to A wave interval was observed. This signifies in these patients a functioning bypass pathway in the retrograde direction as well. Thus it would appear that pre-excitation cannot by eliminated as a diagnostic possibility even if the ECG is normal.
L Gould; C V Reddy; W Chua; C Swamy; J C Dorismond
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Publication Detail:
Type:  Case Reports; Journal Article    
Journal Detail:
Title:  Journal of electrocardiology     Volume:  10     ISSN:  0022-0736     ISO Abbreviation:  J Electrocardiol     Publication Date:  1977 Apr 
Date Detail:
Created Date:  1977-06-30     Completed Date:  1977-06-30     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0153605     Medline TA:  J Electrocardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  157-64     Citation Subset:  IM    
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MeSH Terms
Bundle of His
Electrocardiography* / methods
Heart Conduction System / physiopathology*
Middle Aged
Tachycardia, Paroxysmal / physiopathology*

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