Frequency spectrum analysis of SJM cardiac prosthetic closing sound at mitral position.

DOI
  • FUJITA Y.
    Department of Thoracic and Cardiovascular Surgery, Niigata Univ. School of Medicine
  • HAYASHI J.
    Department of Thoracic and Cardiovascular Surgery, Niigata Univ. School of Medicine
  • MORO H.
    Department of Thoracic and Cardiovascular Surgery, Niigata Univ. School of Medicine
  • SAITO A.
    Department of Thoracic and Cardiovascular Surgery, Niigata Univ. School of Medicine
  • UENO M.
    Department of Thoracic and Cardiovascular Surgery, Niigata Univ. School of Medicine
  • EGUCHI S.
    Department of Thoracic and Cardiovascular Surgery, Niigata Univ. School of Medicine
  • HORI J.
    Faculity of Engineering, Niigata Univ.
  • SAITO Y.
    Faculity of Engineering, Niigata Univ.

Bibliographic Information

Other Title
  • 僧帽弁位ＳＪＭ弁閉鎖音の周波数解析の意義

Description

The closing sounds of eleven St. Jude Medical cardiac prostheses at mitral position were analysed using the technique of the fast Fourier transform. The frequency-spectra contain a peak at about 1KHz, and decline the power to 5 to 7KHz. In two patients, 8.3 years and 4.5 years postoperatively, their frequency spectra of one leaflet showed a dip at 2.5KHz, respectively. The closing sound analysis is a useful methodd for the early detection of thrambosed SJM cardiac prosthesis at mitral position as well as at aortic or pulmonary position.

Journal

  • Jinko Zoki

    Jinko Zoki 19 (1), 382-385, 1990

    JAPANESE SOCIETY FOR ARTIFICIAL ORGANS

Keywords

Details 詳細情報について

  • CRID
    1390282679931729152
  • NII Article ID
    130001733630
  • DOI
    10.11392/jsao1972.19.382
  • ISSN
    18836097
    03000818
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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