Document Detail


Evaluation of age, gender, heart rate and blood pressure changes and exercise conditioning on Doppler measured aortic blood flow acceleration and velocity during upright treadmill testing.
MedLine Citation:
PMID:  2970778     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
To evaluate the effect of upright exercise on aortic peak flow acceleration and velocity, 60 normal subjects between 15 and 74 years of age were evaluated by continuous wave Doppler during treadmill stress testing using the Bruce protocol. Subjects were divided into 3 age groups, each with 20 subjects: group 1, 21 +/- 4 years of age (mean +/- standard deviation), group 2, 36 +/- 5 years and group 3, 58 +/- 7 years. Periodic measurements of heart rate, blood pressure and Doppler blood flow velocity and acceleration were made before, during and after exercise. Continuous wave Doppler measurements were recorded from the suprasternal notch. The relation between Doppler aortic measurements and age, gender, normal heart rate and blood pressure responses during exercise, and exercise preconditioning, was evaluated. Age alone was significantly related (inversely) to immediate postexercise Doppler aortic peak blood flow peak acceleration (group 1, 55 +/- 15, group 2, 46 +/- 11 and group 3, 36 +/- 9 m/s2, p less than 0.05) and peak velocity (1.1 +/- 0.2, 1.0 +/- 0.2 and 0.8 +/- 0.2 m/s, respectively, p less than 0.01). Gender, heart rate and blood pressure changes during exercise, as well as preconditioning, had no significant effect on these flow characteristics. Consequently, the effects of normal aging must be considered when using Doppler measurements of peak aortic acceleration and velocity in the evaluation of left ventricular function, e.g., to detect or exclude the presence of coronary artery disease.
Authors:
M Lazarus; T Y Dang; J M Gardin; A Allfie; W L Henry
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The American journal of cardiology     Volume:  62     ISSN:  0002-9149     ISO Abbreviation:  Am. J. Cardiol.     Publication Date:  1988 Sep 
Date Detail:
Created Date:  1988-09-30     Completed Date:  1988-09-30     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0207277     Medline TA:  Am J Cardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  439-43     Citation Subset:  AIM; IM    
Affiliation:
Department of Medicine, California College of Medicine, University of California, Irvine Medical Center, Orange 92668.
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Aged
Aging / physiology*
Aorta / physiology*
Blood Flow Velocity
Blood Pressure
Exercise Test*
Heart Rate
Hemodynamics*
Humans
Middle Aged
Physical Education and Training*
Physical Exertion
Posture
Rheology
Sex Characteristics*
Time Factors

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


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