Document Detail

Atypical 2nd degree AV block due to bilateral bundle branch block with Wenckebach phenomenon and concealed conduction in the bundle branch system.
MedLine Citation:
PMID:  856598     Owner:  NLM     Status:  MEDLINE    
A case of bilateral bundle branch block is described with the following features: -- 2nd degree infranodal AV block due to bilateral, intermittently synchronous "phase 3" bundle branch block; -- occasional AV conduction failure due to concealed His bundle extrasystoles; -- right bundle branch block pattern due to retrograde activation from the left bundle branch; -- QRS complexes having normal duration due to uniform slow conduction in both bundle branches; -- Wenckebach phenomenon in the right bundle branch; -- concealed conduction in both branches. The above interpretations are based on the use of His bundle recordings, results of right atrial stimulation and of pharmacological testing. Determinations of the lengths of all H--H intervals, whether H was followed by a ventricular response or blocked, permitted insight into the mechanism of 2nd degree AV block with varying (right and left) bundle branch block.
A Brusca; E Rosettani; L Mangiardi; R Bonamini; F Orzan
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Publication Detail:
Type:  Case Reports; Journal Article    
Journal Detail:
Title:  European journal of cardiology     Volume:  5     ISSN:  0301-4711     ISO Abbreviation:  Eur J Cardiol     Publication Date:  1977 Mar 
Date Detail:
Created Date:  1977-06-11     Completed Date:  1977-06-11     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0404054     Medline TA:  Eur J Cardiol     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  183-99     Citation Subset:  IM    
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MeSH Terms
Bundle of His / physiopathology
Bundle-Branch Block / complications*,  physiopathology
Electric Stimulation
Heart Atria / physiopathology
Heart Block / etiology*,  physiopathology
Heart Conduction System / physiopathology*
Time Factors

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