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Temporal and heart-size effects in first-heart-sound spectra

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Abstract

Heart-sound recording are taken from human and animal subjects. Spectral analysis of small time segments of the first heart sound is carried out by means of a spectrograph analyser. Temporal variations in the spectra are observed during the first major component of the first heart sound. Peak energy frequencies in the medium frequency range (50–140 Hz) are observed to increase in successive spectra during the first major component of the first-heart-sound, and also with the decrease in the size of the heart from which the recordings were made.

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Author notes

  1. T. C. Hearn & J. Mazumdar

    Present address: Department of Applied Mathematics, University of Adelaide, 5000, Adelaide, South Australia

Authors and Affiliations

  1. Department of Metallurgy, Mechanics and Meterials, Science, Michigan State University, 48824, East Lansing, Michigan, USA

    T. C. Hearn, J. Mazumdar & R. Hubbard

  2. Department of Biomechanics, Michigan State University, 48824, East Lansing, Michigan, USA

    T. C. Hearn & R. Hubbard

  3. Department of Small Animal Surgery and Medicine, Michigan State University, 48824, East Lansing, Michigan, USA

    G. Eyster

Authors
  1. T. C. Hearn
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  2. J. Mazumdar
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  3. R. Hubbard
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  4. G. Eyster
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Hearn, T.C., Mazumdar, J., Hubbard, R. et al. Temporal and heart-size effects in first-heart-sound spectra. Med. Biol. Eng. Comput. 17, 563–568 (1979). https://doi.org/10.1007/BF02440900

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  • DOI: https://doi.org/10.1007/BF02440900

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