TY - GEN
T1 - Estimation of Splitting Interval in Second Heart Sound by Optimizing a Demixing Vector
AU - Muramatsu, Shun
AU - Yamamoto, Michitaka
AU - Takamatsu, Seiichi
AU - Itoh, Toshihiro
N1 - Publisher Copyright: © 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - A non-invasive method to estimate the splitting interval (SI) of the second heart sound (S2) was developed and evaluated. Recently, there has been a growing need for a non-invasive SI estimation for the early detection of cardiovascular diseases. Therefore, we proposed an SI estimation algorithm by separating the aortic and pulmonary components (A2 and P2, respectively) from S2 with an optimized demixing vector and mathematical model of S2. Herein, we evaluated the SI estimation performance of our algorithm. As a result, our algorithm could determine a simulated S2's SI with an error of $1.3+1.0$ ms. A2 and P2 were separated from recorded human S2 signals. The resulting SI estimation of the recorded data showed a correlation coefficient with S2-S2 intervals of $r=- 0.67$. This negative correlation is consistent with reported physiological features of the heart.
AB - A non-invasive method to estimate the splitting interval (SI) of the second heart sound (S2) was developed and evaluated. Recently, there has been a growing need for a non-invasive SI estimation for the early detection of cardiovascular diseases. Therefore, we proposed an SI estimation algorithm by separating the aortic and pulmonary components (A2 and P2, respectively) from S2 with an optimized demixing vector and mathematical model of S2. Herein, we evaluated the SI estimation performance of our algorithm. As a result, our algorithm could determine a simulated S2's SI with an error of $1.3+1.0$ ms. A2 and P2 were separated from recorded human S2 signals. The resulting SI estimation of the recorded data showed a correlation coefficient with S2-S2 intervals of $r=- 0.67$. This negative correlation is consistent with reported physiological features of the heart.
KW - demixing vector
KW - microphone array
KW - sensor signal processing
KW - splitting of second heart sound
UR - https://www.scopus.com/pages/publications/85179764660
U2 - 10.1109/SENSORS56945.2023.10324940
DO - 10.1109/SENSORS56945.2023.10324940
M3 - Conference contribution
T3 - Proceedings of IEEE Sensors
BT - 2023 IEEE SENSORS, SENSORS 2023 - Conference Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 IEEE SENSORS, SENSORS 2023
Y2 - 29 October 2023 through 1 November 2023
ER -