Document Detail


Hemodynamic and thermal responses to a 30-minute constant-workload aerobic exercise in middle- or old-aged patients with cardiovascular diseases.
MedLine Citation:
PMID:  10834453     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The aim of the present investigation was to compare the hemodynamic and thermal responses to a 30-min aerobic exercise between middle- or old-aged patients with normal left ventricular function and those with left ventricular dysfunction. Constant-load sitting ergometer exercise of approximately 90% of the subject's oxygen uptake (VO2) at the anaerobic threshold for 30 min was conducted in 21 patients with left ventricular dysfunction (61+/-10 years, left ventricular ejection fraction (LVEF) 35+/-7%) and 24 patients with normal left ventricular function (59+/-9 years, LVEF 71+/-7%). Heart rate (HR), blood pressure, deep temperatures in the forehead and thigh, and forearm skin blood flow (SkBF) were measured every minute, and cardiac output (CO) and stroke volume (SV) were determined every 10 min with the dye-dilution technique during the exercise. Patients of both groups exhibited a progressive elevation in each temperature and an increase in SkBF during the exercise. Although the VO2 and CO remained stable, almost the same magnitude of decrease in SV as increase in HR was seen after the 10th min of exercise in both groups. The magnitude of the decrease in SV was greater in old-aged than middle-aged patients with left ventricular dysfunction. Thus, the downward drift in SV during a 30-min constant-load aerobic exercise might not be influenced by left ventricular function, but intensified by aging in patients with left ventricular dysfunction.
Authors:
R Ajisaka; S Watanabe; K Eda; K Sakamoto; T Saitou; I Yamaguchi; Y Sugishita
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Japanese circulation journal     Volume:  64     ISSN:  0047-1828     ISO Abbreviation:  Jpn. Circ. J.     Publication Date:  2000 May 
Date Detail:
Created Date:  2000-09-14     Completed Date:  2000-09-14     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  7806868     Medline TA:  Jpn Circ J     Country:  AUSTRALIA    
Other Details:
Languages:  eng     Pagination:  370-6     Citation Subset:  IM; S    
Affiliation:
Institute of Health and Sport Sciences, University of Tsukuba, Ibaraki, Japan. ajisakas@taiiku.tsukuba.ac.jp
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MeSH Terms
Descriptor/Qualifier:
Adult
Age Factors
Aged
Blood Flow Velocity
Body Temperature / physiology*
Cardiac Output / physiology
Cardiovascular Diseases / therapy*
Exercise / physiology*
Heart Rate
Hemodynamics / physiology*
Humans
Male
Middle Aged
Norepinephrine / blood
Oxygen Consumption / physiology
Stroke Volume / physiology
Ventricular Dysfunction, Left / physiopathology
Ventricular Function, Left / physiology
Chemical
Reg. No./Substance:
51-41-2/Norepinephrine

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


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