Sound Spectroanalytic Diagnosis of Malfunctioning Prosthetic Heart Valve
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- KAGAWA YUZURU
- Department of Thoracic and Cardiovascular Surgery, Tohoku University School of Medicine
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- NITTA SHINICHI
- Department of Thoracic and Cardiovascular Surgery, Tohoku University School of Medicine
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- SATOH NAOSHI
- Department of Thoracic and Cardiovascular Surgery, Tohoku University School of Medicine
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- SAJI KOMEI
- Department of Thoracic and Cardiovascular Surgery, Tohoku University School of Medicine
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- SHIBOTA YUTAKA
- Department of Thoracic and Cardiovascular Surgery, Tohoku University School of Medicine
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- HORIUCHI TOGO
- Department of Thoracic and Cardiovascular Surgery, Tohoku University School of Medicine
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- TANAKA MOTONAO
- Department of Internal Medicine, The Research Institute for Tuberculosis, Leprosy and Cancer, Tohoku University
書誌事項
- タイトル別名
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- Sound Spectroanalytic Diagnosis of Malf
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抄録
Sound spectroanalysis was carried out for diagnosis of malfunctioning prosthetic heart valves in 50 cases, which consisted of 31 mitral, 14 aortic, 4 mitral+aortic and 1 tricuspid valve replacements with the age ranging from 17 to 57 years. Types of prosthetic valves used in this series were Starr-Edwards silicon ball valves, metal ball valves, disc valves, Kay-Shiley valves, Smeloff-Cutter valves and a Björk-Shiley valve. The system used in this study consisted of a moving coil microphone, a preamplifier, a filter (160/24 db octave) and a sound spectrograph (Rion Co. S. G. (7). Contour sound spectrograms (SSG) were drawn and peak frequency, wave pattern and frequency-intensity curves were investigated as characteristics of implanted valvular function. Peak frequencies of valvular opening and closing sounds were recorded between 1800 to 5000 Hz and differed according to the types of prosthesis. In mitral + aortic valve replacements, valvular sounds of two prostheses were clearly separated and this finding was very useful for determining the prosthesis which fell into malfunction. Decrease in peak frequency of valvular sounds or abnormal wave patterns in contour SSG were observed in 9 cases (18%). Of 9 cases, 4 cases underwent re-replacement and 2 cases died of congestive heart failure. Operative or autopsy findings gave proof to the findings in sound spectroanalysis.
収録刊行物
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- The Tohoku Journal of Experimental Medicine
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The Tohoku Journal of Experimental Medicine 123 (1), 77-89, 1977
東北ジャーナル刊行会
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詳細情報 詳細情報について
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- CRID
- 1390282679217616512
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- NII論文ID
- 130003492357
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- NII書誌ID
- AA00863920
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- COI
- 1:STN:280:DyaE1c%2FjsVyjsA%3D%3D
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- ISSN
- 13493329
- 00408727
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- NDL書誌ID
- 1912883
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- PubMed
- 918976
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可