The purpose of this study was to evaluate a method assessing muscle fiber type using frequency analysis of surface electromyograms of the gastrocnemius muscle. [Participants and Methods] Twentyfour healthy adults participated in this study. Voluntary contraction (VC) and maximum voluntary contraction (MVC) of the gastrocnemius muscle were measured using surface electromyograms, and analyzed using power spectrum analysis in the 0 to 260 Hz frequency range. The results were compared with the muscle fiber composition of the gastrocnemius muscle. [Results] No significant difference in frequency distribution between VC and MVC was found. The fiber composition of the gastrocnemius muscle obtained by frequency analysis was Type I, 47.12%, and Type II, 52.87%. [Conclusion] The frequency analysis method of this study showed that the gastrocnemius muscle has a constant frequency pattern regardless of the contraction strength.
[Purpose] We investigated whether an increase or decrease in subcutaneous fat mass
secondary to cardiac cachexia can be evaluated using diagnostic ultrasonography in
patients with heart failure. [Participant and Methods] We report a case of cardiac
cachexia in a patient in whom cachexia was confirmed by weight loss, decreased dietary
intake, and biochemical indicators measured by blood tests. We measured the subcutaneous
fat mass in the patient’s thigh using ultrasonic diagnostic equipment during the cachectic
state, as well as 1 and 2 months later. [Results] An increase in weight and
ultrasonographically documented femoral subcutaneous fat mass was confirmed by improvement
in heart failure-induced cachexia. [Conclusion] Clinically convenient ultrasonic
diagnostic equipment is useful to assess subcutaneous fat mass, which serves as an
indicator of the degree of cachexia.
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