Document Detail

Noncircumferential myofiber function: impact on early diastolic filling in children.
MedLine Citation:
PMID:  11696829     Owner:  NLM     Status:  MEDLINE    
Circumferential and noncircumferential myofiber contraction may have varying impact on systolic and diastolic function. The purpose of this study was to determine the relation of circumferential, longitudinal, and oblique fiber shortening to early diastolic filling in children. Twenty-five patients (8.1 +/- 5.6 years of age; 12 boys and 13 girls) with normal echocardiograms and no heart disease had prospective echocardiographic evaluation of circumferential (shortening fraction, fractional area change), longitudinal (left ventricular axial shortening), combined circumferential and longitudinal (left ventricular ejection fraction), oblique (left ventricular systolic twist [LVST]) shortening, and early diastolic filling. Mean LVST was 16 +/- 8 degrees. There was no relation between early diastolic filling indexes and indexes of circumferential or longitudinal shortening. However, there was a significant inverse relation between heart rate-corrected E-wave acceleration time and LVST (r = 0.63, P <.001). Oblique fiber shortening affects early diastolic filling in children. Describing the functional role of noncircumferential left ventricular myofibers may improve our understanding of global left ventricular function.
E C Michelfelder; P Khoury; S A Witt; B J Glascock; T R Kimball
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Publication Detail:
Type:  Evaluation Studies; Journal Article    
Journal Detail:
Title:  Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography     Volume:  14     ISSN:  0894-7317     ISO Abbreviation:  J Am Soc Echocardiogr     Publication Date:  2001 Nov 
Date Detail:
Created Date:  2001-11-06     Completed Date:  2001-12-18     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8801388     Medline TA:  J Am Soc Echocardiogr     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1065-9     Citation Subset:  IM    
Noninvasive Cardiac Imaging and Hemodynamic Research Laboratory, Division of Cardiology, Children's Hospital Medical Center, 3333 Burnet Ave., OSB-4, Cincinnati, OH 45229, USA.
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MeSH Terms
Child, Preschool
Heart Ventricles / ultrasonography
Infant, Newborn
Muscle Fibers, Skeletal / physiology*
Myocardial Contraction*
Observer Variation
Regression Analysis
Reproducibility of Results
Ventricular Function*

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

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