Document Detail


Comparisons of the skeletal muscle metabolic abnormalities in the arm and leg muscles of patients with chronic heart failure.
MedLine Citation:
PMID:  15170095     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: It has been suspected for some time that patients with chronic heart failure (CHF) have abnormal muscle metabolism, so in the present study the muscle metabolism of the arm and leg were compared by (31)P magnetic resonance spectroscopy ((31)P-MRS) to examine the relationship to exercise tolerance. METHODS AND RESULTS: The study group comprised 13 patients and 11 normal controls. Calf-plantar and forearm-wrist flexion were performed to evaluate the metabolic capacity assessed as the phosphocreatine breakdown rate (PCr-slope) and muscle pH at a submaximal (70% peak) work rate (submax-pH). Exercise of both the arm and leg resulted in an earlier decrease in PCr and muscle pH in patients with CHF compared with controls. There were significant correlations between peak oxygen uptake (peak V(O2)) and the PCr-slope in both limbs in patients with CHF (forearm: r=0.63, p<0.05; calf: r=0.60, p<0.05), but no correlations in normal controls. There was a close correlation between the ventilatory anaerobic threshold (AT) and the PCr-slope in the calf (r=0.85, p<0.01), but not in the forearm in patients with CHF. Submax-pH in both upper and lower limbs was not significantly correlated to peak V(O2) or AT in either patients with CHF or controls. CONCLUSIONS: Although metabolic abnormalities during exercise are seen in both arms and legs, leg muscle abnormalities, in particular, are closely related to systemic exercise intolerance in patients with CHF.
Authors:
Tatsuya Nagai; Koichi Okita; Kazuya Yonezawa; Yutaka Yamada; Akiko Hanada; Mitsunori Ohtsubo; Noriteru Morita; Takeshi Murakami; Hirotaka Nishijima; Akira Kitabatake
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Circulation journal : official journal of the Japanese Circulation Society     Volume:  68     ISSN:  1346-9843     ISO Abbreviation:  Circ. J.     Publication Date:  2004 Jun 
Date Detail:
Created Date:  2004-05-31     Completed Date:  2005-02-09     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  101137683     Medline TA:  Circ J     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  573-9     Citation Subset:  IM    
Affiliation:
Department of Cardiovascular Medicine, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
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MeSH Terms
Descriptor/Qualifier:
Arm
Case-Control Studies
Chronic Disease
Energy Metabolism / physiology*
Exercise Test
Heart Failure / metabolism*,  physiopathology
Humans
Hydrogen-Ion Concentration
Leg
Magnetic Resonance Imaging
Muscle, Skeletal / metabolism*
Oxygen Consumption / physiology
Phosphocreatine / analysis
Phosphorus Isotopes
Chemical
Reg. No./Substance:
0/Phosphorus Isotopes; 67-07-2/Phosphocreatine

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


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