Document Detail


Effects of acute exercise on hemorheological, endothelial, and platelet markers in patients with chronic heart failure in sinus rhythm.
MedLine Citation:
PMID:  11714130     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Chronic heart failure (CHF) is associated with an increased risk of thrombosis and thromboembolic events, including stroke and venous thromboembolism. which may be related to a prothrombotic or hypercoagulable state. Acute vigorous exercise has been associated with activation of hemostasis, and this risk may well be particularly increased in patients with CHF. HYPOTHESIS: The study was undertaken to determine whether acute exercise would adversely affect abnormalities of hemorheological (fibrinogen, plasma viscosity, hematocrit), endothelial (von Willebrand factor), and platelet markers (soluble P selectin) in patients with CHF. METHODS: We studied 22 ambulant outpatients (17 men; mean age 65+/-9 years) with stable CHF (New York Heart Association class II-III and a left ventricular ejection fraction of < or =40%) who were exercised to exhaustion on a treadmill. Results were compared with 20 hospital controls (patients with vascular disease, but free of CHF) and 20 healthy controls. RESULTS: Baseline von Willebrand factor (p = 0.01) and soluble P-selectin (p = 0.006) levels were significantly elevated in patients with CHF when compared with controls. In the patients with CHF who were exercised, plasma viscosity, fibrinogen, and hematocrit levels increased significantly, both immediately post exercise and at 20 min into the recovery period (repeated measures analysis of variance, all p<0.05). There was a positive correlation between exercise workload and the maximal changes in plasma viscosity in the patients with CHF (Spearman r = 0.5, p = 0.02). Plasma viscosity levels increased with exercise in the hospital control group, although no other exercise-induced changes were noted in this group. CONCLUSION: The present study indicates that the hemorheological indices. fibrinogen, and hematocrit specifically increase during acute exercise in patients with CHF. Although moderate exercise should be encouraged in patients with CHF, vigorous exercise should probably be avoided in view of its potential prothrombotic effects in this high-risk group of patients.
Authors:
C R Gibbs; A D Blann; E Edmunds; R D Watson; G Y Lip
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Clinical cardiology     Volume:  24     ISSN:  0160-9289     ISO Abbreviation:  Clin Cardiol     Publication Date:  2001 Nov 
Date Detail:
Created Date:  2001-11-20     Completed Date:  2002-02-20     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  7903272     Medline TA:  Clin Cardiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  724-9     Citation Subset:  IM    
Affiliation:
Haemostasis, Thrombosis, and Vascular Biology Unit, University Department of Medicine, City Hospital, Birmingham, United Kingdom.
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MeSH Terms
Descriptor/Qualifier:
Aged
Analysis of Variance
Biological Markers / blood
Blood Viscosity
Case-Control Studies
Exercise / physiology*
Female
Fibrinogen
Heart Failure / blood*,  physiopathology
Hematocrit
Hemorheology
Humans
Male
Middle Aged
P-Selectin / blood
Statistics, Nonparametric
Thromboembolism / blood*,  physiopathology
von Willebrand Factor / analysis
Chemical
Reg. No./Substance:
0/Biological Markers; 0/P-Selectin; 0/von Willebrand Factor; 9001-32-5/Fibrinogen

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


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