| 摘要 |
PURPOSE:To automatically eliminate or suppress heatbeat fluctuation waveform data containing arrhythmia exerting effect on the spectrum analyzing result of an HF component becoming the investigation object of HRV in the analysis of heartbeat fluctuation waveform due to a hearthbeat interval. CONSTITUTION:The original heartbeat fluctuation waveform is formed from a heartbeat interval and, further, the adjacent interval difference of the original heartbeat fluctuation waveform is calculated to form a relative displacement heartbeat fluctuation waveform or a 1/f fluctuation component waveform is formed from the original heartbeat fluctuation waveform to form a waveform wherein the 1/f fluctuation component waveform is subtracted from the original heartbeat fluctuation wavefonn. Next, the average value and standard deviation of the formed waveform part are calculated and an abnormal judge standard value is determined from the average value and the standard deviation and, when the waveform part is larger than the abnormal judge standard value, arrhythmia is judged and the waveform part is replaced with the value received within the normal distribution range thereof or the original heartbeat fluctuation waveform part is replaced with the average value of the predetermined range thereof and the frequency component thereof is estimated. |
