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Effect of aerobic interval training on erythrocyte rheological and hemodynamic functions in heart failure patients with anemia.
MedLine Citation:
PMID:  23199556     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: Anemia disturbs hemorheological/hemodynamic properties, whereas aerobic interval training (AIT) achieves a superior aerobic fitness in patients with heart failure (HF). This study investigated whether AIT influences functional capacity by modulating hemorheological/hemodynamic functions in HF patients with/without anemia. METHODS: Sixty HF patients were divided into non-anemic (HF-NA, hemoglobin≧12g/dL in women/≧13g/dL in men; n=30) and anemic (HF-A, hemoglobin<11g/dL in women/<12g/dL in men; n=30) groups, and 30 normal counterparts were enrolled as a control group. These HF patients performed AIT (3-minute intervals at 40% and 80%VO(2peak)) on a bicycle ergometer for 30min/day, 3days/week for 12weeks. Erythrocyte rheological and central/peripheral hemodynamic characteristics were determined by slit-flow ektacytometer and bioreactance-based device/near infrared spectrometer, respectively. RESULTS: In both HF-NA and HF-A groups, the AIT regimen 1) reduced blood senescent/spherical erythrocyte counts, 2) diminished the values of critical shear stresses for disaggregation and half-maximal deformation of erythrocytes, 3) enhanced cardiac output during exercise, 4) heightened VO(2peak) and O(2) uptake efficiency slope (OUES), and 5) decreased plasma myeloperoxidase and interleukin-6 levels. However, AIT increased the amounts of blood distributed to the frontal cerebral lobe and vastus lateralis muscle during exercise in HF-NA group but not in HF-A group. Additionally, HF-A group exhibited fewer the enhancements of VO(2peak) and OUES caused by AIT than HF-NA group did. CONCLUSION: AIT improves aerobic capacity and efficiency by depressing aggregability and enhancing deformability of erythrocytes in patients with HF. However, anemic comorbidity attenuates the adaptations of cerebral/muscular hemodynamic responses to exercise following this regimen.
Authors:
Jong-Shyan Wang; Tieh-Cheng Fu; Hen-Yu Lien; Chao-Hung Wang; Chih-Chin Hsu; Wei-Chin Wu; Yu-Wen Chien; Wen-Jin Cherng
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-27
Journal Detail:
Title:  International journal of cardiology     Volume:  -     ISSN:  1874-1754     ISO Abbreviation:  Int. J. Cardiol.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-12-3     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8200291     Medline TA:  Int J Cardiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier Ireland Ltd. All rights reserved.
Affiliation:
Healthy Aging Research Center, Graduate Institute of Rehabilitation Science, Chang Gung University, Tao-Yuan, Taiwan. Electronic address: s5492@mail.cgu.edu.tw.
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