Cited by 37Cardiovascular and exercise physiologyHemoglobin structure and functionMuscle Physiology and Disorders

Myoglobin concentration in skeletal muscle fibers of chronic heart failure patients

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Bekedam, Martijn A., van Beek-Harmsen, Brechje J., van Mechelen, Willem, Boonstra, Anco, van der Laarse, Willem J.·2009·Journal of Applied Physiology

Abstract

The purpose of this study was to determine the myoglobin concentration in skeletal muscle fibers of chronic heart failure (CHF) patients and to calculate the effect of myoglobin on oxygen buffering and facilitated diffusion. Myoglobin concentration, succinate dehydrogenase (SDH) activity, and cross-sectional area of individual muscle fibers from the vastus lateralis of five control and nine CHF patients were determined using calibrated histochemistry. CHF patients compared with control subjects were similar with respect to myoglobin concentration: type I fibers 0.69 +/- 0.11 mM (mean +/- SD), type II fibers 0.52 +/- 0.07 mM in CHF vs. type I fibers 0.70 +/- 0.09 mM, type II fibers 0.49 +/- 0.07 mM in control, whereas SDH activity was significantly lower in CHF in both fiber types (P < 0.01). The myoglobin concentration in type I fibers was higher than in type II fibers (P < 0.01). Consequently, the oxygen buffering capacity, calculated from myoglobin concentration/SDH activity was increased in CHF: type I fibers 11.4 +/- 2.1 s, type II fibers 13.6 +/- 3.9 s in CHF vs. type I fibers 7.8 +/- 0.9 s, type II fibers 7.5 +/- 1.0 s in control, all P < 0.01). The calculated extracellular oxygen tension required to prevent core anoxia (Po2(crit)) in muscle fibers was similar when controls were compared with patients in type I fibers 10.3 +/- 0.9 Torr in CHF and 11.5 +/- 3.3 Torr in control, but was lower in type II fibers of patients 6.1 +/- 2.8 Torr in CHF and 14.7 +/- 6.2 Torr in control, P < 0.01. The lower Po2(crit) of type II fibers may facilitate oxygen extraction from capillaries. Reduced exercise tolerance in CHF is not due to myoglobin deficiency.

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Crossref · 10.1152/japplphysiol.00149.2009

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  1. [5]5. Bergstrom J. Muscle electrolytes in man. Scand J Clin Invest 68, Suppl 7: 110–116, 1962 [Google Scholar]

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Authors
Bekedam, M. A., van Beek-Harmsen, B. J., van Mechelen, W., Boonstra, A., & van der Laarse, W. J.
Affiliations
  • Departments of Cardiology,
  • Physiology, and
  • Department of Public and Occupational Health and EMGO Institute, VU University Medical Center, Amsterdam, The Netherlands
  • Amsterdam Cardiovascular Sciences (NL)
Venue
Journal of Applied Physiology
Published
2009-10
Volume
107
Issue
4
Pages
1138-1143
ISSN
  • 0161-7567 (ISSN-L)
  • 8750-7587
  • 1522-1601
OpenAlex
W2083496094
Cited by
37
References
54
Citations by year
2026: 4 · 2025: 4 · 2024: 5 · 2023: 3 · 2022: 1 · 2021: 3 · 2020: 1 · 2019: 2 · 2018: 3 · 2017: 2 · 2016: 1 · 2015: 1 · 2014: 1 · 2012: 1
FWCI
4.90
Type
journal article
Language
en
Open access
Locations
  • Journal of Applied Physiology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Pure Amsterdam UMC (publishedVersion)
  • Amsterdam UMC (VU Amsterdam) - Institutional Repository (publishedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
Topics
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hemoglobin structure and function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
Keywords
myoglobin, chronic heart failure, skeletal muscle fibers, succinate dehydrogenase activity, muscle fiber type, type I muscle fibers, type II fibers, critical oxygen tension, muscle oxygen extraction, exercise tolerance, vastus lateralis
MeSH terms
Adult, Aged, Buffers, Chronic Disease, Female, Heart Failure, Humans, Male, Middle Aged, Myoglobin, Oxygen, Oxygen Consumption, Succinate Dehydrogenase, Case-Control Studies, Exercise Tolerance, Muscle Fibers, Fast-Twitch, Muscle Fibers, Slow-Twitch, Quadriceps Muscle

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