Document Detail

In vitro sound spectral analysis of prosthetic heart valves by mock circulatory system.
MedLine Citation:
PMID:  7975736     Owner:  NLM     Status:  MEDLINE    
A comparative study was made of the sounds produced by normal prosthetic valves (St. Jude Medical, Bjork-Shiley, polymer) with those produced by the same valves but having simulated thrombosis at the stent, hinge, or strut. Comparisons of the closing sound were made for the power frequency spectra associated with individual valves. We used periodogram approach to obtain the spectral characteristics of the valve prostheses. The closing sound of the abnormal mechanical valves displayed lower apparent peak frequency. But the abnormal polymer valve produced higher apparent peak frequency. The results showed that frequency spectra gave information pertinent to the simulated malfunction. Sound spectral analysis is believed to be a simple and a good diagnostic tool for detection of prosthetic valve malfunction. Also it seemed to be superior to other methods such as phonocardiography and echocardiography.
S H Kim; B C Chang; G Tack; J M Huh; M S Kang; B K Cho; Y H Park
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Yonsei medical journal     Volume:  35     ISSN:  0513-5796     ISO Abbreviation:  Yonsei Med. J.     Publication Date:  1994 Sep 
Date Detail:
Created Date:  1994-12-13     Completed Date:  1994-12-13     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0414003     Medline TA:  Yonsei Med J     Country:  KOREA    
Other Details:
Languages:  eng     Pagination:  271-8     Citation Subset:  IM    
Department of Thoracic & Cardiovascular Surgery, Yonsei University College of Medicine, Seoul, Korea.
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MeSH Terms
Fourier Analysis
Heart Sounds*
Heart Valve Prosthesis*
Models, Cardiovascular*
Signal Processing, Computer-Assisted

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