Document Detail


Tissue Doppler assessment of ventricular function during cycling in 7- to 12-yr-old boys.
MedLine Citation:
PMID:  16826017     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: Studies utilizing submaximal supine exercise have indicated that tissue Doppler imaging (TDI) may be useful for assessing ventricular systolic and diastolic function during exercise and might offer a means of detecting patients with early myocardial dysfunction. This investigation of 14 healthy boys ages 7-12 yr was designed to assess measures of inotropic and lusitropic function during maximal upright cycle exercise. METHODS: Color tissue Doppler imaging (S and E' waves, indicative of systolic and diastolic function, respectively), stroke volume, and mitral peak inflow velocity (E wave) were recorded at rest and during a progressive upright cycle test to exhaustion. RESULTS: Values of TDI-S and TDI-E' were obtained at exhaustive exercise in all but one subject. Mean value of S rose 163% (3.8+/-1.2 to 10.0+/-2.5 cm.s), and average E' increased by 92% (-6.3+/-2.2 to -12.1+/-3.2 cm.s). No significant changes were observed in the ratio of E' to mitral peak flow velocity (E), suggesting that left ventricular end-diastolic pressure remained stable. CONCLUSIONS: These data indicate that measurement of TDI is feasible during maximal upright exercise, and velocities obtained may provide insights into ventricular systolic and diastolic functional capacity.
Authors:
Thomas Rowland; Kevin Heffernan; Sae Young Jae; George Echols; Bo Fernhall
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  38     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2006 Jul 
Date Detail:
Created Date:  2006-07-07     Completed Date:  2006-11-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1216-22     Citation Subset:  IM; S    
Affiliation:
Department of Pediatrics, Baystate Medical Center, Springfield, MA 01106, and Department of Kinesiology, University of Illinois, Urbana-Champaign, IL, USA. rowland@bhs.org
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MeSH Terms
Descriptor/Qualifier:
Bicycling*
Blood Pressure Determination
Cardiac Output
Child
Connective Tissue / ultrasonography
Echocardiography, Doppler, Pulsed*
Exercise Test
Humans
Male
Physical Fitness
Stroke Volume
Ventricular Function, Left / physiology*

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


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