[The algorithm of extracting respiratory information from single channel electrocardiogram].
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 (0.1-0.4 Hz), the output of the band pass filter is the EDR.
Zhao
Jie
J
School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
Hua
Mei
M
D000465:Algorithms; D004562:Electrocardiography / Q000379:methods*; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D012119:Respiration; D012815:Signal Processing, Computer-Assisted