Title :
Study on the generation of closing sound from metallic prosthetic heart valve implants
Author :
Koymen, H. ; Baykal, A. ; Ider, Y.Z. ; Zorlutuna, Y. ; Tasdemi, O. ; Tezcaner, T. ; Vural, K.
Author_Institution :
Dept. of Electr. & Electron. Eng., Middle East Tech. Univ., Ankara, Turkey
Abstract :
The closing sounds of St. Jude bileaflet heart valve sounds recorded in air are studied, and the relation between the frequency spectrum of these signals and PCG (phonocardiography) signals recorded from the patients who have the same prosthesis implanted in aortic position is discussed. During the experiment one of the leaflets is fixed and loaded by different methods to observe the possible variation in the signals. It is observed that the frequency spectra of the signals recorded in air have a power spectrum similar to the transfer function of the amplifier in the frequency range 100-1500 Hz. PCG signals have all the frequency components between 100 and 500 Hz
Keywords :
bioacoustics; cardiology; prosthetics; 100 to 1500 Hz; St. Jude bileaflet heart valve sounds; aortic position; closing sound generation; metallic prosthetic heart valve implants; phonocardiography; power spectrum; transfer function; Acoustical engineering; Frequency; Heart valves; Hospitals; Implants; Power amplifiers; Power system modeling; Prosthetics; Resonance; Transfer functions;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.95568
