In vitro sound spectral analysis of prosthetic heart valves by mock circulatory system
Yonsei Medical Journal
; : 271-278, 1994.
Artigo
em Inglês
| WPRIM (Pacífico Ocidental)
| ID: wpr-162658
Biblioteca responsável:
WPRO
ABSTRACT
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.
Texto completo:
Disponível
Base de dados:
WPRIM (Pacífico Ocidental)
Assunto principal:
Processamento de Sinais Assistido por Computador
/
Próteses Valvulares Cardíacas
/
Estudo Comparativo
/
Ruídos Cardíacos
/
Análise de Fourier
/
Modelos Cardiovasculares
Tipo de estudo:
Estudo prognóstico
Limite:
Humanos
Idioma:
Inglês
Revista:
Yonsei Medical Journal
Ano de publicação:
1994
Tipo de documento:
Artigo