Document Detail

Loud first heart sound with long P-R intervals.
MedLine Citation:
PMID:  1115000     Owner:  NLM     Status:  MEDLINE    
A case of partial atrioventricular block with Wenckebach periods and a loud first heart sound (S1) associated with the longest P-R interval of the cardiac cycles is described. Although the surface electrocardiogram provided no clues to this paradoxical behavior, the intraatrial electrogram revealed that the long P-R interval with the loud S1 was accompanied by atrial echoes (reciprocal atrial beats). The loud S1 with a very long P-R interval was always caused by an atrial contraction synchronous with the QRS complex.
N Ali
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The American journal of cardiology     Volume:  35     ISSN:  0002-9149     ISO Abbreviation:  Am. J. Cardiol.     Publication Date:  1975 Mar 
Date Detail:
Created Date:  1975-05-10     Completed Date:  1975-05-10     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0207277     Medline TA:  Am J Cardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  435-8     Citation Subset:  AIM; IM    
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MeSH Terms
Heart Atria / physiopathology
Heart Auscultation*
Heart Block / diagnosis*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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