A Method for the Measurement of Second Heart Sound Split Based on Modified S Transform

Qing-Shu LIU, Xiao-Mei WU


The time delay between A2 and P2, which is known as S2 split is reported to have
significant diagnostic potential. This paper proposes a target function to optimize the standard S transform, and the genetic algorithm (GA) is employed to select the optimal parameter, so that the modified S transform has a better measure ability for S2 split. In order to evaluate the
performance of the proposed method, a quantitative experiment was performed on simulated S2 signals with different split duration between A2 and P2. The effectiveness was compared with the standard S transform and another modified version of S transform.


S2 split, Modified S transform, Genetic algorithm


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