Determinación de la posición del sonido s1 por promediado de puntos en la energía del fonocardiograma

Abstract

In this paper, a method to determine the position of the heart sound S1 in the PCG signal is presented, in order to measure heart rate variability using PCG and ECG signals. The proposed method computes the position of the heart sound S1 in each beat by the average of three points on the PCG energy signal. The method was evaluated using two different approaches that were applied to the PCG records form a group of healthy volunteers. The results were excellent in comparison with other methods reported in literature. © Springer-Verlag Berlin Heidelberg 2007.