Document Detail


The left ventricular vibration mode in the ventricular transfer function method and at the moment of the first heart sound.
MedLine Citation:
PMID:  2578015     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Several investigators have aimed to clarify the patient's left ventricular (LV) physical properties by free vibration analysis of heart sound. Recently we have developed a transfer function (TF) method to calculate the LV viscoelasticity. To clarify whether this TF method and a clinical first heart sound (1 HS) analysis are based on the identical ventricular vibration mode analysis, we examined (1) the visualized LV vibration image in the TF method and (2) the quantitative relationship between the peak frequency of the 1 HS spectrum and that of TF curve in the early and late phase of the 1 HS. Isolated isovolumic potassium arrested canine left ventricles were used to visualize the vibration mode in describing the TF (N = 2). Examination of stroboscopically illuminated, slow-motion images revealed the oscillation of the ventricle to be of mode 2 behavior. To analyze the quantitative relation between the TF method and 1 HS analysis we used ten open-chest dogs. The correlation was good (r = 0.917) when the peak frequency of the TF curve at the early phase of the 1 HS was compared to the peak frequency of the 1 HS. We concluded that both the TF method and 1 HS analysis were based on the common, second-order ventricular vibration mode. Therefore, some information on the ventricular physical properties suggeted by the TF method could also be included in the clinical data obtained by 1 HS analysis.
Authors:
Y Koiwa; T Ohyama; T Takagi; J Kikuchi; H Honda; R Hashiguchi; Y Shimizu; J P Butler; T Takishima
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Publication Detail:
Type:  In Vitro; Journal Article    
Journal Detail:
Title:  Frontiers of medical and biological engineering : the international journal of the Japan Society of Medical Electronics and Biological Engineering     Volume:  1     ISSN:  0921-3775     ISO Abbreviation:  Front Med Biol Eng     Publication Date:  1988  
Date Detail:
Created Date:  1991-01-29     Completed Date:  1991-01-29     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9011464     Medline TA:  Front Med Biol Eng     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  59-70     Citation Subset:  IM    
Affiliation:
First Department of Internal Medicine, Tohoku University School of Medicine, Sendai, Japan.
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MeSH Terms
Descriptor/Qualifier:
Animals
Dogs
Heart / physiology*
Heart Sounds / physiology*
Pressure
Ventricular Function
Vibration*

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


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