Document Detail

"Presystolic" augmentation of diastolic heart sounds in atrial fibrillation.
MedLine Citation:
PMID:  1258774     Owner:  NLM     Status:  MEDLINE    
In the presence of atrial fibrillation, the diastolic murmur of mitral stenosis can appear augmented during early systole before the mitral valve closure sound. This phenomenon has previously been thought to be due to increased blood flow velocity across the narrowing mitral valve orifice. We have observed patients in whom the third heart sound (S3) gallop, the diastolic flow murmur of atrial septal defect and mitral insufficiency and the initial muscular component of the first heart sound become more intense during this period with short, critically timed cycle lengths. This phenomenon appears to be neither peculiar to nor indicative of mitral stenosis and is probably a direct result of the initial muscular contraction of an underfilled ventricle. Either the contraction itself or the sudden deceleration of the rapidly moving flow of blood across the atrioventricular orifice may produce the sound.
A J Bonner; J Stewart; M E Tavel
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The American journal of cardiology     Volume:  37     ISSN:  0002-9149     ISO Abbreviation:  Am. J. Cardiol.     Publication Date:  1976 Mar 
Date Detail:
Created Date:  1976-05-18     Completed Date:  1976-05-18     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0207277     Medline TA:  Am J Cardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  427-31     Citation Subset:  AIM; IM    
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MeSH Terms
Atrial Fibrillation / diagnosis*
Heart Block / diagnosis
Heart Septal Defects / diagnosis
Heart Sounds
Mitral Valve Insufficiency / diagnosis

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

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