Extraction of vibration feature using purpose designed wavelets for heart diagnosis

Tovar, B, Wang, W J and Torry, J N (2010) Extraction of vibration feature using purpose designed wavelets for heart diagnosis. In: IEEE International Conference on Wavelet Analysis and Pattern Recognition, Qingdao, Shandong China.

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Abstract

The heart sounds with systolic murmurs can be characterized and visualized as a result of free and forced vibrations in human hearts. A joint time frequency distribution with oscillating windows is proposed to extract the signals from heart sounds. Two types of mother wavelets are designed as matching templates based on the nature of murmurs. The time-frequency maps of the analyzed phonocardiographic (PCG) signal are compared to show which type of templates matches better with the systolic murmurs. Practical applications are addressed for two types of cardiac abnormalities, aortic stenosis and mitral regurgitation. It has been demonstrated that by means of using different oscillating window functions, different characteristics of the heart sounds associated to the heart disease can be enhanced in the time-frequency domain analysis. 2010 IEEE.

Item Type: Conference or Workshop Item (Paper)
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Depositing User: William Wang
Date Deposited: 06 Feb 2012 19:03
Last Modified: 11 Apr 2012 09:23
URI: http://srodev.sussex.ac.uk/id/eprint/19123
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