Detection of the valvular split within the second heart sound using the reassigned smoothed pseudo Wigner–Ville distribution

BioMedical Engineering OnLine

Abdelghani Djebbari¹  Fethi Bereksi-Reguig¹ 

[1] University of Tlemcen, Faculty of technology, BP119, Tlemcen, Algeria

关键词: Reassigned Smoothed Wigner–Ville distribution;    Valvular split;    Heart sound;    Phonocardiography;   

Others  :  797893
DOI  :  10.1186/1475-925X-12-37

 received in 2012-09-15, accepted in 2012-11-19,  发布年份 2013

【 摘 要 】

Background

In this paper, we developed a novel algorithm to detect the valvular split between the aortic and pulmonary components in the second heart sound which is a valuable medical information.

Methods

The algorithm is based on the Reassigned smoothed pseudo Wigner–Ville distribution which is a modified time–frequency distribution of the Wigner–Ville distribution. A preprocessing amplitude recovery procedure is carried out on the analysed heart sound to improve the readability of the time–frequency representation. The simulated S2 heart sounds were generated by an overlapping frequency modulated chirp–based model at different valvular split durations.

Results

Simulated and real heart sounds are processed to highlight the performance of the proposed approach. The algorithm is also validated on real heart sounds of the LGB–IRCM (Laboratoire de Génie biomédical–Institut de recherches cliniques de Montréal) cardiac valve database. The A2–P2 valvular split is accurately detected by processing the obtained RSPWVD representations for both simulated and real data.

【 授权许可】

   
2013 Djebbari and Bereksi-Reguig; licensee BioMed Central Ltd.

【 图 表 】

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