【摘要】 基于除呼吸作用以外,能够引起正常的QRS波群中R波振幅的干扰因素也较少的事实,提出使用室上性的QRS波群由心电提取呼吸信息(EDR)(ECG-derivedrespiratorysignal)的算法。该算法先将单通道心电进行小波分解,再将小波近似在适当尺度上的室上性波R波振幅在时间上进行延拖,通过一低通滤波器后再将抽样频率降低至5Hz,再通过一带通滤波器(0.1~0.4Hz)后,即可得到EDR。更多还原

【Abstract】 Because the factors of interference in R wave of normal QRS are few except for respiration, the algorithm uses supra ventricular beats in the ECG to extract respiratory signal (EDR)(ECG-derived respiratory signal). The method used here firstly transfers the original single lead ECG signal into the wavelet, then prolongs R amplitudes of supra ventricular beats in the proper scale approximation of wavelet, then the prolonged signal passes a low pass filter, then reduces sample rate to 5 Hz, finally through a band pass filter (0.1-0.4Hz), the output of the band pass filter is the EDR.更多还原