Yonsei Med J.
1994 Sep;35(3):271-278. 10.3349/ymj.1994.35.3.271.
In vitro sound spectral analysis of prosthetic heart valves by mock circulatory system
- Affiliations
-
- 1Cardiovascular Research Institute, Yonsei University College of Medicine, Seoul, Korea.
- 2Department of Thoracic & Cardiovascular Surgery, Yonsei University College of Medicine, Seoul, Korea.
- 3Department of Biomedical Engineering, Yonsei University College of Medicine, Seoul, Korea.
- 4Department of Biomedical Engineering & Center for Lung Research, Vanderbilt University, Nashiville, Tennessee, U.S.A.
- KMID: 1728911
- DOI: http://doi.org/10.3349/ymj.1994.35.3.271
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.
- Full Text Links
-
- Actions
-
Cited
- CITED
-
- Close
- Share
-
- Similar articles
-
- In vitro pressure drop comparison between two mechanical valve prostheses
- Spectral analysis of heart valve sound for detection of prosthetic heart valve diseases
- The Heart Sound Data Analysis, Management System using the Wireless Stethoscope
- Reoperations on Heart Valve Prostheses
- Selection and Complications of Prosthetic Heart Valves
