Low-Frequency Electrical Stimulation Increases Muscle Strength and Improves Blood Supply in Patients With Chronic Heart Failure

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  • Dobsak Petr
    Department of Functional Diagnostics and Rehabilitation
  • Novakova Marie
    Department of Physiology, Faculty of Medicine, Masaryk University of Brno
  • Siegelova Jarmila
    Department of Functional Diagnostics and Rehabilitation
  • Fiser Bohumil
    Department of Physiology, Faculty of Medicine, Masaryk University of Brno
  • Vitovec Jiri
    1st Department of Internal Medicine, St Anna Faculty Hospital and Masaryk University of Brno
  • Nagasaka Makoto
    Department of Internal Medicine and Rehabilitation Science, Tohoku University Graduate School of Medicine
  • Kohzuki Masahiro
    Department of Internal Medicine and Rehabilitation Science, Tohoku University Graduate School of Medicine
  • Yambe Tomoyuki
    Department of Medical Engineering and Cardiology, Institute of Development, Aging and Cancer, Tohoku University of Sendai
  • Nitta Shin-ichi
    Department of Medical Engineering and Cardiology, Institute of Development, Aging and Cancer, Tohoku University of Sendai
  • Eicher Jean-Christophe
    Department of Cardiology II, Hospital du Bocage and University of Burgundy
  • Wolf Jean-Eric
    Department of Cardiology II, Hospital du Bocage and University of Burgundy
  • Imachi Kou
    Tohoku University Biomedical Engineering Research Organization, Tohoku University Graduate School of Medicine

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Background This study was designed to evaluate the effects of low-frequency electrical stimulation (LFES) on muscle strength and blood flow in patients with advanced chronic heart failure (CHF). Methods and Results Patients with CHF (n=15; age 56.5±5.2 years; New York Heart Association III - IV; ejection fraction 18.7±3.3%) were examined before and after 6 weeks of LFES (10 Hz) of the quadriceps and calf muscles of both legs (1 h/day, 7 days/week). Dynamometry was performed weekly to determine maximal muscle strength (Fmax; N) and isokinetic peak torque (PTmax; Nm); blood flow velocity (BFV) was measured at baseline and after 6 weeks of LFES using pulsed-wave Doppler velocimetry of the right femoral artery. Six weeks of LFES significantly increased Fmax (from 224.5±96.8 N to 340.0±99.4 N; p<0.001), and also PTmax (from 94.5±41.5 Nm to 135.3±28.8 Nm; p<0.01). BFV in the femoral artery increased after 6 weeks from 35.7±15.4 cm/s to 48.2±18.1 cm/s (p<0.05); BFV values at rest before and after 6 weeks of LFES did not differ significantly. Conclusions LFES may improve muscle strength and blood supply, and could be recommended for the treatment of patients with severe CHF. (Circ J 2006; 70: 75 - 82)<br>

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  • Circulation Journal

    Circulation Journal 70 (1), 75-82, 2006

    一般社団法人 日本循環器学会

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