NDLI: Measurement of sounds generated by mechanical aortic and mitral heart valve prostheses

Content Provider	IEEE Xplore Digital Library
Author	Nygaard, H. Inderbitzen, R. Hasenkam, J.M. Wieting, D.W. Paulsen, P.K.
Copyright Year	1994
Description	Author affiliation: Dept. of Electron. Eng., Eng. Coll. of Aarhus, Denmark (Nygaard, H.)
Abstract	Sounds and vibrations produced by prosthetic heart valves may reflect the structural and functional integrity of their components. In fact early signs of valve failure might be disclosed by spectral analysis of the opening or closing sounds. Mechanical heart valve prostheses generate clicking sounds as a result of the periodic opening and closing movement of the occluder. While the opening click is usually only detectable with phonocardiography, the closing click may well be audible over a considerable distance and may be annoying to the patients as well as to their families. In order to investigate these phenomena properly in humans, it is necessary to pick up the sounds at a point at the chest and during physical and physiological conditions, which gives the best signal-to-noise ratio (S/N). Therefore, the purpose of the study was to determine the location on the human chest with the highest S/N of precordial sounds from mechanical aortic and mitral valve prostheses. This was accomplished by precordial mapping of sound distribution as a function of patient position, respiratory phase and transducer type. The results suggest that sounds from mechanical aortic and mitral valve prostheses should be measured in the precordial area of the fourth left and fifth left intercostal space near the sternum.<>
Starting Page	55
Ending Page	60
File Size	249109
Page Count	6
File Format	PDF
ISBN	0818662565
DOI	10.1109/CBMS.1994.315987
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-06-10
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Mechanical variables measurement Prosthetics Heart valves Humans Vibrations Spectral analysis Signal to noise ratio Acoustic transducers Area measurement Sternum
Content Type	Text
Resource Type	Article

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Analysis of spectral features of mechanical heart valve sounds after aortic and mitral valve replacement

Processing of prosthetic heart valve sounds for classification

In-vitro study of mechanical heart valve sound loudness as measured by ISO-532/B

Spectral composition of closing sounds produced by mechanical prosthetic heart valves

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Spectral analysis of first and second heart sounds before and after mechanical heart valve implantation

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Spectral Analysis of Heart Sounds Produced by Disorder Mechanical Prosthetic Heart Valves

Modelling Chorded Prosthetic Mitral Valves using the Immersed Boundary Method

Measurement of sounds generated by mechanical aortic and mitral heart valve prostheses

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