The Use of Multichannel Photoplethysmography for the Analysis of Heart Rate Variability

Heart rate variability (HRV) is a parameter of heart reactivity which is used to describe fluctuation of intervals between two consecutive heart beats. The paper focuses on the analysis of HRV from PPG and ECG signals derived from multichannel PPG. The suitable methods of preprocessing of signals are described in order to obtain the accurate result of HRV analysis and several effects causing changes in HRV are evaluated. Its object is to evaluate accuracy of the measurement from PPG beside ECG because this method is not used in common practise and analyse the changes of HRV during day.