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Published on: June 1, 2019
Detection of the valvular split within the second heart sound using the reassigned smoothed pseudo Wigner-Ville
Abdelghani Djebbari1, Fethi Bereksi-Reguig
1University of Tlemcen, Faculty of technology, BP119, Tlemcen, Algeria. a.djebbari@umontreal.ca
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.
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