Title :
Analysis of diastolic heart sounds before and after angioplasty
Author :
Akay, M. ; Bauer, M. ; Semmlow, J.L. ; Welkowitz, W. ; Kostis, J.
Author_Institution :
Dept. of Biomed. Eng., Rutgers Univ., Piscataway, NJ, USA
Abstract :
The frequency spectra of diastolic heart sounds are compared before and after angioplastic surgery. Since the low-level sounds associated with partially occluded coronary arteries will be contaminated with considerable background noise, traditional FFT analysis may not produce an accurate frequency spectrum. Eigenvector methods have been selected to generate the frequency spectra because of their higher resolution, particularly in the presence of noise. In all cases a marked decrease in high frequency spectral components was observed following angioplasty.<>
Keywords :
bioacoustics; biomedical measurement; cardiology; eigenvalues and eigenfunctions; patient diagnosis; spectral analysis; surgery; FFT analysis; angioplasty; diastolic heart sounds; eigenvectors; fast Fourier transforms; heart sounds frequency spectra; noise; partially occluded coronary arteries; patient diagnosis; surgery;
Conference_Titel :
Engineering in Medicine and Biology Society, 1988. Proceedings of the Annual International Conference of the IEEE
Conference_Location :
New Orleans, LA, USA
Print_ISBN :
0-7803-0785-2
DOI :
10.1109/IEMBS.1988.94505
