Document Detail


Sex influence on myocardial function with exercise in adolescents.
MedLine Citation:
PMID:  20737616     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVES: Ventricular systolic functional response to exercise has been reported to be superior in adult men compared to women. This study explored myocardial responses to maximal upright progressive exercise in late pubertal males and females.
METHODS: Doppler echocardiographic techniques were utilized to estimate myocardial function response to a bout of progressive cycle exercise.
RESULTS: Systolic functional capacity, as indicated by ejection rate (12.5 +/- 2.8 and 13.1 +/- 1.0 [x10(-2)] ml s(-1) cm(-2) for boys and girls, respectively) and peak aortic velocity (208 +/- 45 and 196 +/- 12 cm s(-1), respectively) at maximal exercise, did not differ between the two groups. Similarly, peak values as well as increases in transmitral pressure gradient (mitral E flow velocity), ventricular relaxation (tissue Doppler imaging E'), and left ventricular filling pressure (E/E' ratio) as estimates of diastolic function were similar in males and females.
CONCLUSIONS: This study failed to reveal qualitative or quantitative differences between adolescent boys and girls in ventricular systolic or diastolic functional responses to maximal cycle exercise.
Authors:
Thomas Rowland; Viswanath Unnithan; Max Garrard; Denise Roche; Kathryn Holloway; Julie Sandoval; Simon Marwood
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  American journal of human biology : the official journal of the Human Biology Council     Volume:  22     ISSN:  1520-6300     ISO Abbreviation:  Am. J. Hum. Biol.     Publication Date:    2010 Sep-Oct
Date Detail:
Created Date:  2010-08-25     Completed Date:  2011-01-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8915029     Medline TA:  Am J Hum Biol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  680-2     Citation Subset:  IM    
Copyright Information:
(c) 2010 Wiley-Liss, Inc.
Affiliation:
Department of Pediatrics, Baystate Medical Center, Springfield, Massachusetts, USA. Thomas.rowland@bhs.org
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adolescent Development
Cardiac Output / physiology*
Echocardiography, Doppler
Exercise / physiology*
Female
Heart Rate / physiology*
Humans
Male
Puberty
Sex Characteristics*
Stroke Volume / physiology*
Ventricular Function, Left / physiology*

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


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