TY - GEN
T1 - Microwave reflectometric measurement of heart-rate variability and stress evaluation
AU - Mase, A.
AU - Ito, N.
AU - Komada, Y.
AU - Kobayashi, A.
AU - Maruyama, T.
AU - Shimazu, H.
AU - Sakata, E.
AU - Sakai, F.
PY - 2012
Y1 - 2012
N2 - The stress evaluation becomes important for the prior prevention of stress-related illnesses. One of the methods is to analyze the fluctuations of heartbeat called by heart rate variability (HRV), since the heartbeat interval is constantly fluctuating by reflecting autonomous nerve activity. The HRV has been obtained from peak intervals in an electrocardiogram (ECG). However, the use of the ECG is not suitable for a long time monitor, since several electrodes have to be attached to a human body. We report here on an evaluation method of the heart rate variability and stress using a microwave reflectometer with frequency of 10 GHz. The key technical developments (phase detector with AGC amplifier, data processing for HRV evaluation) are described. The protocol for stress evaluation examination is prepared in order to apply to various testee. The values of HRV and its spectra obtained by a reflectometer are in good agreement with those obtained by ECG.
AB - The stress evaluation becomes important for the prior prevention of stress-related illnesses. One of the methods is to analyze the fluctuations of heartbeat called by heart rate variability (HRV), since the heartbeat interval is constantly fluctuating by reflecting autonomous nerve activity. The HRV has been obtained from peak intervals in an electrocardiogram (ECG). However, the use of the ECG is not suitable for a long time monitor, since several electrodes have to be attached to a human body. We report here on an evaluation method of the heart rate variability and stress using a microwave reflectometer with frequency of 10 GHz. The key technical developments (phase detector with AGC amplifier, data processing for HRV evaluation) are described. The protocol for stress evaluation examination is prepared in order to apply to various testee. The values of HRV and its spectra obtained by a reflectometer are in good agreement with those obtained by ECG.
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U2 - 10.1109/APMC.2012.6421685
DO - 10.1109/APMC.2012.6421685
M3 - Conference contribution
AN - SCOPUS:84874403731
SN - 9781457713309
T3 - Asia-Pacific Microwave Conference Proceedings, APMC
SP - 625
EP - 627
BT - 2012 Asia-Pacific Microwave Conference, APMC 2012 - Proceedings
T2 - 2012 Asia-Pacific Microwave Conference, APMC 2012
Y2 - 4 December 2012 through 7 December 2012
ER -
